因式分解(3m 4n)²-(m-2n)²

因式分解(3m 4n)²-(m-2n)²
因式分解(3m 4n)²-(m-2n)²

因式分解(3m 4n)²-(m-2n)²
(3m 4n)²-(m-2n)²
=[(3m-4n)+(m-2n)][(3m-4n)-(m-2n)]
=(4m-6n)(2m-2n)
=4(2m-3n)(m-n);
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