因式分解:9a2(x-y)+4b2(y-x

因式分解:9a2(x-y)+4b2(y-x)
2025-04-13 13:26:37
推荐回答(1个)
回答1:

9a2(x-y)+4b2(y-x)
=9a2(x-y)-4b2(x-y)
=(x-y)(9a2-4b2
=(x-y)(3a+2b)(3a-2b).