求(n-2m)³(2m-n)+(n-2m)²(2m-n)²
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求(n-2m)³(2m-n)+(n-2m)²(2m-n)²
求(n-2m)³(2m-n)+(n-2m)²(2m-n)²
求(n-2m)³(2m-n)+(n-2m)²(2m-n)²
(n-2m)³×(2m-n)+(n-2m)²×(2m-n)²
=-(n-2m)³×(n-2m)+(n-2m)²×(n-2m)²
=-(n-2m)^4+(n-2m)^4
=0
(n-2m)³×(2m-n)+(n-2m)²×(2m-n)²
=-(n-2m)³×(n-2m)+(n-2m)²×(n-2m)²
=-(n-2m)^4+(n-2m)^4
=0