4a^2x-4a^2y-b^2x+b^y
问题描述:
4a^2x-4a^2y-b^2x+b^y
如题
答
4a^2x-4a^2y-b^2x+b^y
=4a^2(x-y)-b^2(x-y)
=(4a^2-b^2)(x-y)
=(2a+b)(2a-b)(x-y)