(X+Y)的平方-16(x-y)的平方 用分解因式.

问题描述:

(X+Y)的平方-16(x-y)的平方 用分解因式.

[(x+y)+4(x-y)][(x+y)-4(x-y)]
=(5x-3y)(5y-3x)

(X+Y)的平方-16(x-y)的平方
=[(x+y)+4(x-y)][(x+y)-4(x-y)]
=(5x-3y)(5y-3x)