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