因式分解
问题描述:
因式分解
1.(a^2b^2+1)-4a^2b^2)
2 4m^2(x-y)+n^2(y-x)
3 (x-1)^2-1+x
打错了 第一题是(a^2b^2+1)^2-4a^2b^2
答
1、题目有问题?
2、
4m^2(x-y)+n^2(y-x)
=4m^2(x-y)-n^2(x-y)
=(4m^2-n^2)(x-y)
=(2m+n)(2m-n)(x-y)
3、
(x-1)^2-1+x
=(x-1)^2+(x-1)
=(x-1)(x-1+1)
=x(x-1)