作业帮5a²b(x-y)的三次方-30ab²（y-x）²
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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)