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时间:2019-08-24
《初中因式分解习题》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、因式分解练习题1(一)填空1.一个多项式若能因式分解,则这个多项式被其任一因式除所得余式为_________.2.变形(1)(a+b)(a-b)=a2-b2,(2)a2-b2=(a-b)(a+b)中,属于因式分解过程的是________.3.若a,b,c三数中有两数相等,则a2(b-c)+b2(c-a)+c2(a-b)的值为_________.4.12.718×0.125-0.125×4.718=_________.5.1.13×2.5+2.25×2.5+0.62×2.5=_________.6.分解因式:a2(b2-c2)-c2(b-c)(
2、a+b)=_________.7.因式分解:(a-2b)(3a+4b)+(2a-4b)(2a-3b)=(a-2b)·( ).8.若a+b+c=m,则整式m·[(a-b)2+(b-c)2+(c-a)2]+6(a+b+c)(ab+bc+ca)可用m表示为_______________.9.(2x+1)y2+(2x+1)2y=_________.10.因式分解:(x-y)n-(x-y)n-2=(x-y)n-2·_________.11.m(a-m)(a-n)-n(m-a)(a-n)=_________.12.因式分解:x(m-n)+(n-m)y
3、-z(m-n)=(m-n)( ).13.因式分解:(x+2y)(3x2-4y2)-(x+2y)2(x-2y)=________.14.21a3b-35a2b3=_________.15.3x2yz+15xz2-9xy2z=__________.16.x2-2xy-35y2=(x-7y)( ).17.2x2-7x-15=(x-5)( ).18.20x2-43xy+14y2=(4x-7y)( ).19.18x2-19x+5=( )(2x-1).20.6x2-13x+6=( )( ).21.5x2+4xy-28y2=(
4、 )( ).22.-35m2n2+11mn+6=-( )( ).23.6+11a-35a2=( )( ).24.6-11a-35a2=( )( ).25.-1+y+20y2=( )( ).26.20x2+( )+14y2=(4x-7y)(5x-2y).27.x2-3xy-( )=(x-7y)(x+4y).28.x2+( )-28y2=(x+7y)(x-4y).29.x2+( )-21y2=(x-7y)(x+3y).30.kx2+5x-6=(3x-2)( ),k=______.31.6x
5、2+5x-k=(3x-2)( ),k=______.32.6x2+kx-6=(3x-2)( ),k=______.33.18x2-19x+5=(9x+m)(2x+n),则m=_____,n=_____.34.18x2+19x+m=(9x+5)(2x+n),则m=_____,n=_____.35.20x2-43xy+14y2=(4x+m)(5x+n),则m=_____,n=_____.36.20x2-43xy+m=(4x-7y)(5x+n),则m=_____,n=_____.38.x4-4x3+4x2-1=_______.39.2x2-
6、3x-6xy+9y=________.40.21a2x-9ax2+6xy2-14ay2=________.41.a3+a2b+a2c+abc=________.42.2(a2-3ac)+a(4b-3c)=_________.43.27x3+54x2y+36xy2+8y3_______.44.1-3(x-y)+3(x-y)2-(x-y)3=_______.45.(x+y)2+(x+m)2-(m+n)2-(y+n)2=_______.46.25x2-4a2+12ab-9b2=_______.47.a2-c2+2ab+b2-d2-2cd=_____
7、__.48.x4+2x2+1-x2-2ax-a2=________.50.a2-4b2-4c2-8bc=__________.51.a2+b2+4a-4b-2ab+4=________.
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