七年级下沪科版数学第八章整式乘除与因式分解测试卷共三套

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1、第八章教学质量检测卷1一选择题（每题3分，共30分）1.下列关系式中，正确的是 （ ）A.(a-b)2=a2-b2 B.(a+b)(a-b)=a2-b2 C.(a+b)2=a2+b2 D.(a+b)2=a2-2ab+b22.x5m+3n+1(xn)2(-xm)2等于 （ ）A.-x7m+n+1 B.x7m+n+1 C.x7m-n+1 D.x3m+n+13.若36x2-mxy+49y2是完全平方式，则m的值是 （ ）A.1764 B.42 C.84 D.84“2008北京奥运会”国家体育场的“鸟巢”钢结构工程施工中，首次用了我国科研人员自主研制的强度为4.6108帕的钢材，那么4.6108的原数

2、是( )A.4600000 B.46000000 C5.代数式ax2-4ax+4a分解因式，结果正确的是 （ ）A.a(x-2)2 B.a(x+2)2 C.a(x-4)2 D.a(x+2)(x-2)，则的值是 （ ）A.9 B.7 C.11 7.下列多项式中，不能用公式法因式分解的是 ( )A. B. C. D. （ ）A.(ab2)3=ab6 B.(3xy)3=9x3y3 C.(-2a2)2=-4a4 D.(x2y3)2=x4y69.若x+y=2,xy=-2 ,则(1-x)(1-y)的值是 （ ）A.-1 B.1 C.5 10.(x2+px+q)(x2-5x+7)的展开式中，不含x3和x2项

3、，则p+q的值是 （ ）A.-23 B.23 C.15 二、填空（每小题3分，共18分）5x=3,5y=2,则5x-2y= . 2x=8y+1,81y=9x-5,则xy= .12.分解因式x2+ax+b时，甲看错了a的值，分解的结果是(x+6)(x-1),乙看错了b,分解的结果是(x-2)(x+1),那么x2+ax+b分解因式正确的结果是 .13.若（x2+y2）(x2+y2-1)-12=0,那么x2+y2= .14.一个长方形的长增加了4，宽减少了1，面积保持不变，长减少2，宽增加1，面积仍保持不变，则这个长方形的面积是 .15.若m2+n2=5,m+n=3,则mn的值是 .16.已知x2+

4、4x-1=0,那么2x4+8x3-4x2-8x+1的值是 .三、解答题（72分）17.计算（每小题4分，共16分） (-3a2-4)2 (-2y3)2+(-4y2)3-(-2y)2(-3y2)2 （3）(3x-2y)2-(3x+2y)2+3x2y22xy （4）(8x5y2-4x2y5)(-2x2y)18.因式分解（每小题5分，共20分）8a-4a2-4 (x2-5)2+8(5-x)2+16 （4）a(x-y)-b(y-x)+c(x-y)19.化简求值（每小题8分，共16分）(x2+3x)(x-3)-x(x-2)2+(-x-y)(y-x) 已知，其中x=3 y=-2 求代数式的值.20.（10

5、分）已知(x+y)2=4,(x-y)2=3,试求：x2+y2的值. xy的值.21.（10分）将一条20m长的镀金彩边剪成两段，恰可以用来镶两张不同的正方形壁画的边（不计接头处），已知两张壁画面积相差10，问这条彩边应剪成多长的两段？第八章 整式的乘除与因式分解测试题2一、选择题：（每小题3分，共30分）1计算的结果是 （） 2计算的结果是 （）3下列多项式能进行因式分解的是 （） 4若，则的值为 （） 5若，则等于 （） 6计算的结果为 （） 7如果是完全平方式，那么的值是 （） 或或8若可以分解为，由的值为 （） 9.计算（28a314a27a）（7a）的结果为 （ ）A4a22aB4a2

6、2a1 C4a22a1D4a22a110.多项式36a2bc48ab2c24abc2的公因式是 （ ）A12a2b2c2B6abcC12abcD36a2b2c2二、填空题：（每小题3分，共21分）11计算_12计算_13把分解因式的结果为_14（_）.15如果的计算结果中不含的一次项，那么_16已知，则_17观察下列顺序排列的等式：，猜想第个等式（为正整数）应为_三、解答题（共69分）18、计算题：（每小题5分，共20分）（x3）（x3）（x29）； （a+b2）（ab2）；（a2）22（a3）（a3）（a1）2 （4）19（每小题6分，共12分）把下列各式分解因式：（1）； （2）20、计算

7、（9分）21.（10分）先化简，再求值 ，其中，22.(10分)按下列程序计算，把答案写在表格内：n平方+nn-n答案 (1)填写表格： 输入n 3 2 2 3输出答案 1 (2)请将题中计算程序用代数式表达出来，并给予化简第八章整式乘除与因式分解测试题3一、选择题：（每小题3分，共30分）1下列计算结果正确的是 （ ）A. B. C. D. 2下列运算结果错误的是 （ ）A. B. C. D. 3 给出下列各式，其中运算正确有 （ ）A 3个 B 4个 C 5 个 D 6个4下列各式中，计算结果是的是 （ ）A B. C. D.5下列各式计算中，结果正确的是 （ ）A B. C. D. 6.

8、 在下列各式中，运算结果为的是 （ ）A. B. C. D.7下列计算中，正确的是 （ ）A. B. C. D. 8. 的运算结果正确的是 （ ）A. B. C. D .9 若，则有 （ ）A . B. C. D.10.下列分解因式错误的是 （ ）A15a25a5a(3a1)Bx2y2(xy)(xy)Caxxayy(a1)(xy)Da2bcabac(ab)(ac)二、填空题：（每小题3分，共21分）11、如果是一个完全平方式, 则的值为_ _ 12. = 。x2+ax+b时，甲看错了a的值，分解的结果是(x+6)(x-1),乙看错了b,分解的结果是(x-2)(x+1),那么x2+ax+b分解因

9、式正确的结果是 .14.若（x2+y2）(x2+y2-1)-12=0,那么x2+y2= .15、若m2+n2=5,m+n=3,则mn的值是 .16、若关于x的分式方无解，则m的值为_ 。17、边长分别为和的两个正方形按如图(I)的样式摆放，则图中阴影部分的面积为 三、解答题（共69分）18、计算题：（每小题6分，共24分）（1） （2） （3） （4） 19、解方程：（9分）20、先化简，后求值：（10分），其中21、解答题（共26分）（1）(12分)已知：为不等于0的数，且，求代数式的值（2）（14分） 已知：，求的值（英文版 ） easily blame, to prevent the b

10、roken window effect. Supervise the leading cadres to play an exemplary role, take the lead in the strict implementation of the and , lead to safeguard the solemnity and authority of the party discipline, ensure that the party discipline and the laws and regulations for implementation in place. Throu

11、ghout the discipline in the daily supervision and management, strengthen supervision and inspection, from the thorough investigation of violations of discipline behavior. Strengthen to key areas, key departments and key projects as well as the masses reflect the concentration of the units and depart

12、ments for supervision. - strengthening supervision, discipline inspection and supervision of cadres to set an example for compliance with the and is a man must be hexyl, blacksmith needs its own hardware. Discipline inspection organs as the executor of the party discipline, and supervisor of the def

13、enders, for its supervision must be more strictly, discipline inspection and supervision of cadres to firmly establish the awareness of Party Constitution, sense of discipline and rules consciousness, politics loyalty, sense obey. Action speak Ji Ordinance to set an example of the regulations of the

14、 rule of law, strengthen supervision and accept the supervision of the firmness and consciousness, do comply with and . To firmly establish the discipline must first be disciplined, the supervisor will be subject to the supervision of concept, and consciously safeguard and implement party compasses

15、party, take the lead in practicing three strict real strict, so loyal, clean, play. To be good at learning, the Constitution and the as morality, politics and brought to fruition; to implement , do not want to, dare not, not with disciplinary ruler to supervision; to discipline a ruler, often the co

16、ntrol inspection, and consciously in the ideological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached: indifferent to heart, calmly to the table in our life, there are many unpredictable things will

17、 happen, some good, some bad things, we cannot control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing, but then we muddy however did not know, this is the life teach us things. 1, life can be comple

18、x, can also be simple. Want simple life of precipitation, to have enough time to reflect, to make Become more perfect. Life is the most important thing is not to win, but the struggle; not to have conquered, but to have fought well. 2, the plain is the background of life. Live a plain life, give up

19、on themselves is not a coward, but the wise answers; not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment; not unrewarding perfunctorily, but calm attitude of life of unrestrained self-confidence. Plain living, there is no noise noisy, no earthly trouble

20、s, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the aba

21、ndoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrow-minded, too care around the chores and penny wise and pound foolish, no

22、t worth the candle. Some things to attract trouble and worry, completely depends on how we look at and deal with it. Dont always take everything back to things, and dont get into a blind alley, dont want to face, dont be narrow-minded. Poke to care, is a kind of open-minded, a free and easy. 5, I am

23、 not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people; I am not afraid of the truth to tell the best friend, Im afraid he turned to it as a joke to tell dont 6, when we are in a positive frame of mind, you will find many good things; and when

24、 we are in a negative state of mind, you will find many depressed things; life happy and worry, all is you of life attitude, optimistic, good luck; loss of sink, Eritrea company. When you are in adversity, may wish to change a point of view to think everything over to the good Think, because good me

25、ntality decided the fate of the! 7, people are tired, rest; heart tired, calm. Grow up, mature, this society read. Tired and sad, squat down, to their a hug. Because the world no one can sympathize with you, have mercy on you. You cry, tears is your own; you pain, no one can understand. Then you onl

26、y tears to smile. 8, each people have youth,Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same; now want anything, for fear that others know, or like to lose the same. 9, the heart move, everything in the world is followed by b

27、irth, Rangrang, important thing is often the most difficult to open ones mouth, because words will reduce its importance; to let strangers people care about your life in the good things, the original is not easy 10, do not blame, do not laugh at who, also dont envy who. Like a person is a kind of fe

28、eling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind; no matter how many grievances, how uncomfortable, and ultimately to h

29、eal themselves or their own, others may got you to comfort, but never know your heart is how wanjianchuanxin. 12, maam, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodness, helping others. Instead of accusing the society, as into one; and an exception is better to

30、give than to what 13, dont envy him A sum of, dont lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our persistent, we want to cherish the memory of those people and things. 14, learn to smile, learn to

31、strong, the world you know so many people, so many people and you are, you cannot change also cant let everyone like you, so also do not want to do. Life is too short to go crazy to love to go to waste, to chase the dream to regret. 15, when temper, a blessing to go. A wounding elegant people, the k

32、ey is to control their own emotions. With the mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two years of time to learn to speak, but to spend a few years time to shut up. That is a kind of abil

33、ity, that is a kind of wisdom. 16, life is not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, there is only one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 towa

34、rd the bottom of the sink. 17, in some way, do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you; you learn knowledge, is you have weapons, you can start from scratch, but not unarmed; how do you treat people,

35、 does not represent how others treat you, if cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still there. Every life, after the ups and downs The best test of live, to life, survival and continuatio

36、n, do not stop the struggle in the joys and sorrows of life on the road, so that different soul to bear life beat, acceptance of suffering. 19, indifferent to heart, calmly in table, elegant and comfortable life, do not take what is so important. The pursuit will be disappointed; to be alive, you wi

37、ll have trouble. Life is the most afraid of what all want to care about, but also what all grasp is not firm, without scenery, separated populations, such as not to desire, all docked in the fate of the end. Why is too rigid, the natural, to go stay not to live, let go of obsession, revel is 20, if

38、the fate of the broken Hopes of sailing, please dont despair, the coast is still, if the fate of the withered petals of the beautiful, please do not sink, the spring is still, life will always be endless trouble, please dont helpless, because they are still alive, is still a dream, the sun still, we

39、 still. Lost, keep memories; to get, must work to; but the most important is good to cherish their own. 21, life, select the complex, is to choose the pain; choose a simple, is choose to be happy. The complex world like aSignificance of pride. Hope is the ornate palace, outside people admiring the m

40、agnificent, living in the deep knowledge of living it to pay the price. Simple world as a simple log cabin outside ridiculed shabby, the heart is willing to go live to know the joy. Suffering and joy is their own choice. 22, learn how to use a single powerful heart, let the past be the past, let the

41、 future come. Life is really the end of the end of an eagle is flying wings, life is constantly pursuit. Dont miss to regret, dont wait for old just miss. Time to return, seize every moment, again painstakingly again tired also Those struggling to fly. 23, life could not Yimapingchuan, even flat pav

42、ement, inevitably there will be a few pieces of roadblocks. Some of the rocks around the past, while others have to move it out. Just move others put the stone is very easy, because the stone from the appearance we can discern; difficult to myself to move away the heart of stone head. Leave time to

43、spend with her, often reflect my heart, so as to remove your heart of stone. 24, everything does not have to be demanding, come to, everything does not have to care about, over the past; failing to do not frown, laugh it laugh. Results Dont demand, do to; life is a simple, calm and peaceful. Always

44、not to choose their own path and regret, life is like a train, the scenery and then the United States will retreat, the passage of time and encounter will eventually drifting further and further away, before is always himself. 25, everyone has a weakness, weakness is true humanity. That has no weakn

45、ess, a shallow person. That people think there is no weakness, mostly false. Life has shortcomings, there are shortcomings is the real life. That no one regret, or childish or numbness or Self deception. It is in tolerance of weakness and so on to accept, people live happily.Hello, everyone! I am a

46、party member. The title of my speech is: study and implement the partys two laws, doing practical play highway. 2015 October 18, the Central Committee of the Communist Party of China promulgated the implementation of the and Chinese Communist Party discipline and punishment regulations. We Heyuan ma

47、le passers-by to respond positively to the call of the Central Committee of the party, earnestly organize the study party two regulations, truly grasp the essence and gist, and in their respective positions, to hold the bottom line of the discipline, build a strong ideological line of defense, with

48、the courage to play, the courage to fight tough and fearless spirit, at the crucial moment well to complete the task, with practical action to test the study and implement effect Because of discipline in the * * * * * * * * * * * story. Here, let me to cast a brick to attract jade, speak about our h

49、ighway. Highway line section of the road surface transformation project, last year towards the country seized will be seized one of the items. To complete this arduous task, as a project management office director Comrade, keep in mind from the Communist Party membership, recognize and identify the

50、bottom line, strict management, and strict adherence to the quality of the project. He not only set an example, honesty and self-discipline, but also requires the management of all the members of the O.K., do not eat the construction unit one meal, do not accept the construction unit a ceremony. In

51、this way, they didnt really dare to adhere to the principle. No comrade, constantly put on reworking an emergency meeting to Comrade Zhen to speak louder, management tube too strict. Remember in Dongguan Street, 400 meters long cement concrete surface layer, because of various reasons, the smoothnes

52、s of the poor in the bottom cavity, covering film traces and car imprinting quality problems, * * * inquiries, immediately rushed to the scene to understand and verify the situation, the convening of the management office, the construction units, supervision units, construction units, construction u

53、nits construction time is tight, the economic loss and other reasons to intercede * unmoved. He said, now a popular word, to the discipline and rules quite in front, there are no rules Radius, you construction team not accordance with the technical specifications, quality problems, it must be to car

54、ry out rectification. Engineering quality responsibility be weightier than Mount Tai, if we manage to this matterPavement quality quantity are placed the matter, we this time to learn two regulations have what use? Still what is the Communist Party? Finally, in his insisted, the road after rework, t

55、o solve these problems. In the construction of the new comrades and the project all the colleagues efforts, after four months of fighting, the project the main project was finally completed and passed inspection. Thousands of miles of ice, thousands of miles Piao, this is a splendid and romantic sce

56、ne. But snow for the highway, it is a disaster, a serious threat to the traffic safety. This year, a month, a century of cold wave swept from North to south, and the snow blowing to Guangdong, but also to bear the blow To * * * * the highway. In January on the evening of 23, Lianping county city tem

57、peratures dropped to minus 2 degrees, a wide range of sudden rain sleet, before and after the provincial S341 line in Jiulianshan Mountain tunnel sections of the road appeared in the snow, lead to the passing vehicles skid, traffic is blocked. In the face of the sudden natural disasters, city and county highway department immediately launched the emergency plan for disaster prevention. As the front line of the mai