ax+by-ay-bx

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

ax+by-ay-bx
ax+by-ay-bx

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

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

想求什么??写清楚