因式分解练习题 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)=a-b,(2)a-b=(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 a(b-c)+b(c-a)+c(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:a(b-c)-c(b-c)(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)+(b-c)+(c-a)]+6(a+b+c)(ab+bc+ca)可用m表示为_______________. 9.(2x+1)y+(2x+1)y=_________. 10.因式分解:(x-y)-(x-y)=(x-y)·_________. 11.m(a-m)(a-n)-n(m-a)(a-n)=_________. 12.因式分解:x(m-n)+(n-m)y-z(m-n)=(m-n)( ). 13.因式分解:(x+2y)(3x-4y)-(x+2y)(x-2y)=________. 14.21ab-35ab=_________. 15.3xyz+15xz-9xyz=__________. 222323222nn-2n-2222222222222222216.x-2xy-35y=(x-7y)( ). 17.2x-7x-15=(x-5)( ). 18.20x-43xy+14y=(4x-7y)( ). 19.18x-19x+5=( )(2x-1). 20.6x-13x+6=( )( ). 21.5x+4xy-28y=( )( ). 22.-35mn+11mn+6=-( )( ). 23.6+11a-35a=( )( ). 24.6-11a-35a=( )( ). 25.-1+y+20y=( )( ). 26.20x+( )+14y=(4x-7y)(5x-2y). 27.x-3xy-( )=(x-7y)(x+4y). 28.x+( )-28y=(x+7y)(x-4y). 29.x+( )-21y=(x-7y)(x+3y). 30.kx+5x-6=(3x-2)( ),k=______. 31.6x+5x-k=(3x-2)( ),k=______. 32.6x+kx-6=(3x-2)( ),k=______. 33.18x-19x+5=(9x+m)(2x+n),则m=_____,n=_____. 2222222222222222222222222 本文来源:https://www.wddqw.com/doc/b74a3ef4ba0d4a7302763aad.html