(y-x)的三次方乘以(x-y)的m次方+(x-y)的m+1次方乘以(y-x)的二次方

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(y-x)的三次方乘以(x-y)的m次方+(x-y)的m+1次方乘以(y-x)的二次方
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(y-x)的三次方乘以(x-y)的m次方+(x-y)的m+1次方乘以(y-x)的二次方
(y-x)的三次方乘以(x-y)的m次方+(x-y)的m+1次方乘以(y-x)的二次方

(y-x)的三次方乘以(x-y)的m次方+(x-y)的m+1次方乘以(y-x)的二次方
提取公因式(y-x)的平方乘以(9x-y)的m次方,后面是[(y-x)+(x-y)],原式=(y-x)的平方乘以(x-y)的m次方乘以0,最后结果等于0.