化简(a-b)²÷(ax+by-ay-xy)-(a-b)÷(x-y)第2个括号里的是ax+by-ay-bx

问题描述:

化简(a-b)²÷(ax+by-ay-xy)-(a-b)÷(x-y)
第2个括号里的是ax+by-ay-bx

(a-b)²÷(ax+by-ay-xy)-(a-b)÷(x-y)
=(a-b)²÷[a(x-y)-b(x-y]-(a-b)÷(x-y)
=(a-b)²÷(x-y)(a-b)-(a-b)÷(x-y)
=(a-b)÷(x-y)-(a-b)÷(x-y)
=0