2x²(x-y)²+xy(y-x)³答案是几用提取公因式
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2x²(x-y)²+xy(y-x)³答案是几用提取公因式
2x²(x-y)²+xy(y-x)³答案是几
用提取公因式
2x²(x-y)²+xy(y-x)³答案是几用提取公因式
原式=x(y-x)^2[2x+y(y-x)]
=x(y-x)^2(2x+y^2-xy)
=2x²(x-y)²-xy(x-y)³
=x(x-y)²[2x-y(x-y)]
=x(x-y)²(2x-xy+y²)