因式分解:a2x2-4+a2y2-2a2xy

问题描述:

因式分解:a2x2-4+a2y2-2a2xy

a2x2-4+a2y2-2a2xy,
=(a2x2-2a2xy+a2y2)-4,
=a2(x2-2xy+y2)-4,
=a2(x-y)2-22
=(ax-ay+2)(ax-ay-2).