要使分式x^2-y^2/a^2x-a^2y乘以ax+ay/[x+y]^2
问题描述：
要使分式x^2-y^2/a^2x-a^2y乘以ax+ay/[x+y]^2
答
(x^2-y^2)/(a^2x-a^2y)×[(ax+ay)/(x+y)^2]
=[(x+y)(x-y)]/[a^2(x-y)]×[a(x+y)/(x+y)^2]
=1/a
祝你好运