(a+b)²+(a-b)²-4ab因式分解

问题描述:

(a+b)²+(a-b)²-4ab因式分解

(a+b)²+(a-b)²-4ab
=a²+2ab+b²+(a-b)²-4ab
=a²-2ab+b²+(a-b)²
=(a-b)²+(a-b)²
=2(a-b)²
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