整式的乘法练习题(一)填空1.a8=(-a5)______.2.a15=()5.3.3m2·2m3=______.4.(x+a)(x+a)=______.5.a3·(-a)5·(-3a)2·(-7ab3)=______.6.(-a2b)3·(-ab2)=______.7.(2x)2·x4=()2.8.24a2b3=6a2·______.9.[(am)n]p=______.10.(-mn)2(-m2n)3=______.11.多项式的积(3x4-2x3+x2-8x+7)(2x3+5x2+6x-3)中x3项的系数是______.12.m是x的六次多项式,n是x的四次多项式,则2m-n是x的______次多项式.14.(3x2)3-7x3[x3-x(4x2+1)]=______.15.{[(-1)4]m}n=______.16.-{-[-(-a2)3]4}2=______.17.一长方体的高是(a+2)厘米,底面积是(a2+a-6)厘米2,则它的体积是______.18.若10m=a,10n=b,那么10m+n=______.19.3(a-b)2[9(a-b)n+2](b-a)5=______(a-b)n+9.20.已知3x·(xn+5)=3xn+1-8,那么x=______.21.若a2n-1·a2n+1=a12,则n=______.22.(8a3)m÷[(4a2)n·2a]=______.23.若a<0,n为奇数,则(an)5______0.24.(x-x2-1)(x2-x+1)n(x-x2-1)2n=______.25.(4+2x-3y2)·(5x+y2-4xy)·(xy-3x2+2y4)的最高次项是______.26.已知有理数x,y,z满足|x-z-2|+(3x-6y-7)2+|3y+3z-4|=0,则x3n+1y3n+1z4n-1的值(n为自然数)等于______.(二)选择28.下列计算正确的是[]A.9a3·2a2=18a5;B.2x5·3x4=5x9;C.3x3·4x3=12x3;D.3y3·5y3=15y9.29.(ym)3·yn的运算结果是[]B.y3m+n;C.y3(m+n);D.y3mn.30.下列计算错误的是[]A.(x+1)(x+4)=x2+5x+4;B.(m-2)(m+3)=m2+m-6;C.(y+4)(y-5)=y2+9y-20;D.(x-3)(x-6)=x2-9x+18.31.计算-a2b2·(-ab3)2所得的结果是[]A.a4b8;B.-a4b8;C.a4b7;D.-a3b8.32.下列计算中错误的是[]A.[(a+b)2]3=(a+b)6;B.[(x+y)2n]5=(x+y)2n+5;C.[(x+y)m]n=(x+y)mn;D.[(x+y)m+1]n=(x+y)mn+n.33.(-2x3y4)3的值是[]A.-6x6y7;B.-8x27y64;C.-8x9y12;D.-6xy10.34.下列计算正确的是[]A.(a3)n+1=a3n+1;B.(-a2)3a6=a12;C.a8m·a8m=2a16m;D.(-m)(-m)4=-m5.35.(a-b)2n·(b-a)·(a-b)m-1的结果是[]A.(a-b)2n+m;B.-(a-b)2n+m;C.(b-a)2n+m;D.以上都不对.36.若0<y<1,那么代数式y(1-y)(1+y)的值一定是[]A.正的;B.非负;C.负的;D.正、负不能唯一确定.37.(-2.5m3)2·(-4m)3的计算结果是[]A.40m9;B.-40m9;C.400m9;D.-400m9.38.如果b2m<bm(m为自然数),那么b的值是[]A.b>0;B.b<0;C.0<b<1;D.b≠1.39.下列计算中正确的是[]A.am+1·a2=am+2;D.[-(-a)2]2=-a4.40.下列运算中错误的是[]A.-(-3anb)4=-81a4nb4;B.(an+1bn)4=a4n+4b4n;C.(-2an)2·(3a2)3=-54a2n+6;D.(3xn+1-2xn)·5x=15xn+2-10xn+1.41.下列计算中,[](1)b(x-y)=bx-by,(2)b(xy)=bxby,(3)bx-y=bx-by,(4)2164=(64)3,(5)x2n-1y2n-1=xy2n-2.A.只有(1)与(2)正确;B.只有(1)与(3)正确;C.只有(1)与(4)正确;D.只有(2)与(3)正确.42.(-6xny)2·3xn-1y的计算结果是[]A.18x3n-1y2;B.-36x2n-1y3;C.-108x3n-1y;D.108x3n-1y3.44.下列计算正确的是[]A.(6xy2-4x2y)·3xy=18xy2-12x2y;B.(-x)(2x+x2-1)=-x3-2x2+1;C(-3x2y)(-2xy+3yz-1)=6x3y2-9x2y2z2-3x2y;45.下列计算正确的是[]A.(a+b)2=a2+b2;B.am·an=amn;C.(-a2)3=(-a3)2;D.(a-b)3(b-a)2=(a-b)5.[]47.把下列各题的计算结果写成10的幂的形式,正确的是[]A.100×103=106;B.1000×10100=103000;C.1002n×1000=104n+3;D.1005×10=10005=1015.48.t2-(t+1)(t-5)的计算结果正确的是[]A.-4t-5;B.4t+5;C.t2-4t+5;D.t2+4t-5.49.使(x2+px+8)(x2-3x+q)的积中不含x2和x3的p,q的值分别是[]A.p=0,q=0;B.p=-3,q=-9;C.p=3,q=1;D.p=-3,q=1.51.若n为正整数,且x2n=7,则(3x3n)2-4(x2)2n的值为[]A.833;B.2891;C.3283;D.1225.(三)计算52.(6×108)(7×109)(4×104).53.(-5xn+1y)·(-2x).54.(-3ab)·(-a2c)·6ab2.55.(-4a)·(2a2+3a-1).56.(3m-n)(m-2n).57.(x+2y)(5a+3b).58.(-ab)3·(-a2b)·(-a2b4c)2.59.[(-a)2m]3·a3m+[(-a)5m]2.60.xn+1(xn-xn-1+x).61.(x+y)(x2-xy+y2).62.5x(x2+2x+1)-(2x+3)(x-5).63.(2x-3)(x+4).64.(-2ab2)3·(3a2b-2ab-4b2)65.-8(a-b)3·3(b-a)66.2[(x+2)(x+1)-3]+(x-1)(x-2)-3x(x+3).67.(-4xy3)·(-xy)+(-3xy2)2.68.计算[(-a)2m]3·a3m+[(-a)3m]3(m为自然数).69.先化简(x-2)(x-3)+2(x+6)(x-5)-3(x2-7x+13),再求其值,其中x=70.已知ab2=-6,求-ab(a2b5-ab3-b)的值.108.已知a+b=1,a(a2+2b)+b(-3a+b2)=0.5,求ab的值.110.已知(x-1)(x+1)(x-2)(x-4)≡(x2-3x)2+a(x2-3x)+b,求a,b的值.111.多项式x4+mx2+3x+4中含有一个因式x2-x+4,试求m的值,并求另一个因式.112.若x3-6x2+11x-6≡(x-1)(x2+mx+n),求m,n的值.113.已知一个两位数的十位数字比个位数字小1,若把十位数字与个位数字互换,所得的新两位数与原数的乘积比原数的平方多405,求原数.114.试求(2-1)(2+1)(22+1)(24+1)…(232+1)+1的个位数字.116.解方程3x(x+2)+(x+1)(x-1)=4(x2+8).118.求不等式(3x+4)(3x-4)>9(x-2)(x+3)的正整数解.124.试证代数式(2x+3)(3x+2)-6x(x+3)+5x+16的值与x的值无关.16、若求:M-N的值是A.正数B.负数C.非负数D.可正可负21、已知x+y=5,,求x-y24、已知求a、b的值25、已知,求xy的值26、已知的值27、已知的值《乘法公式》练习题(一)一、填空题1.(a+b)(a-b)=_____,公式的条件是_____,结论是_____.2.(x-1)(x+1)=_____,(2a+b)(2a-b)=_____,(31x-y)(31x+y)=_____.3.(x+4)(-x+4)=_____,(x+3y)(_____)=9y2-x2,(-m-n)(_____)=m2-n24.98×102=(_____)(_____)=()2-()2=_____.5.-(2x2+3y)(3y-2x2)=_____.6.(a-b)(a+b)(a2+b2)=_____.7.(_____-4b)(_____+4b)=9a2-16b2,(_____-2x)(_____-2x)=4x2-25y28.(xy-z)(z+xy)=_____,(65x-0.7y)(65x+0.7y)=_____.9.(41x+y2)(_____)=y4-161x2二、选择题11.下列多项式乘法,能用平方差公式进行计算的是()A.(x+y)(-x-y)B.(2x+3y)(2x-3z)C.(-a-b)(a-b)D.(m-n)(n-m)12.下列计算正确的是()A.(2x+3)(2x-3)=2x2-9B.(x+4)(x-4)=x2-4C.(5+x)(x-6)=x2-30D.(-1+4b)(-1-4b)=1-16b213.下列多项式乘法,不能用平方差公式计算的是()A.(-a-b)(-b+a)B.(xy+z)(xy-z)C.(-2a-b)(2a+b)D.(0.5x-y)(-y-0.5x)14.(4x2-5y)需乘以下列哪个式子,才能使用平方差公式进行计算()A.-4x2-5yB.-4x2+5yC.(4x2-5y)2D.(4x+5y)215.a4+(1-a)(1+a)(1+a2)的计算结果是()A.-1B.1C.2a4-1D.1-2a416.下列各式运算结果是x2-25y2的是()A.(x+5y)(-x+5y)B.(-x-5y)(-x+5y)C.(x-y)(x+25y)D.(x-5y)(5y-x)三、解答题17.1.03×0.9718.(-2x2+5)(-2x2-5)19.a(a-5)-(a+6)(a-6)20.(2x-3y)(3y+2x)-(4y-3x)(3x+4y)21.(31x+y)(31x-y)(91x2+y2)22.(x+y)(x-y)-x(x+y)23.3(2x+1)(2x-1)-2(3x+2)(2-3x)24.9982-425.2003×2001-20022《乘法公式》练习题(二)1.222)(baba--()2.2222)(yxyxyx---()3.2222)(bababa--()4.2229122)32(yxyxyx()5.2294)32)(32(yxyxyx()6______________)3)(32(yxyx;7._______________)52(2yx;8.______________)23)(32(yxyx;9.______________)32)(64(yxyx;10________________)221(2yx11.____________)9)(3)(3(2xxx;12.___________1)12)(12(xx;13。4))(________2(2xx;14._____________)3)(3()2)(1(xxxx;15.____________)2()12(22xx;16.224)__________)(__2(yxyx;17.______________)1)(1)(1)(1(42xxxx;18.下列多项式乘法中不能用平方差