ax+by-ay-bx

问题描述:

ax+by-ay-bx

想求什么??写清楚

=ax-ay-(bx-by)
=a(x-y)-b(x-y)
=(a-b)(x-y)

ax+by-ay-bx
=x(a-b)-y(a-b)
=(a-b)(x-y)