把6x(x-y)的平方+3(y-x)的立方分解因式
我知道答案是6x(x-y)^2+3(y-x)^3=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]=3(x-y)^2(x+y)可为什么=6x(x...
我知道答案是6x(x-y)^2+3(y-x)^3
=6x(x-y)^2-3(x-y)^3
=3(x-y)^2[2x-(x-y)]
=3(x-y)^2(x+y)可为什么=6x(x-y)^2-3(x-y)^3
=3(x-y)^2[2x-(x-y)]
请解释 展开
=6x(x-y)^2-3(x-y)^3
=3(x-y)^2[2x-(x-y)]
=3(x-y)^2(x+y)可为什么=6x(x-y)^2-3(x-y)^3
=3(x-y)^2[2x-(x-y)]
请解释 展开
3个回答
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(y-x)^3=(-1)(-1)^3(y-x)^3
=(-1)(x-y)^3
=-(x-y)^3
最后的结果是3(x-y)^2(x+y),而不是3(x-y)^2[2x-(x-y)]
=(-1)(x-y)^3
=-(x-y)^3
最后的结果是3(x-y)^2(x+y),而不是3(x-y)^2[2x-(x-y)]
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展开全部
6x(x-y)²-3(x-y)³
=6x(x-y)²-3(x-y)²(x-y)
提取公因式=3(x-y)²[2x-(x-y)]
=6x(x-y)²-3(x-y)²(x-y)
提取公因式=3(x-y)²[2x-(x-y)]
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