5a²b(x-y)的三次方-30ab²（y-x）²

5a²b(x-y)的三次方-30ab²（y-x）²
5a²b(x-y)的三次方-30ab²（y-x）²

5a²b(x-y)的三次方-30ab²（y-x）²
5a²b(x-y)的三次方-30ab²（y-x）²
=5ab(x-y)²（ax-ay-6b）

5a²b(x-y)³-30ab²（y-x）²
=5ab(x-y)² × ( a(x-y)-6b )...................................提取公因式
=5ab(x-y)² × ( ax-ay-6b )

5a²b(x-y)＾3-30ab²（y-x）²
=5a²b(x-y)＾3-30ab²（x-y）²
=5ab(x-y)^2(ax-ay-6)