(a-b)²(a+b)²-(a²+b²)²分解因式
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(a-b)²(a+b)²-(a²+b²)²分解因式
(a-b)²(a+b)²-(a²+b²)²分解因式
(a-b)²(a+b)²-(a²+b²)²分解因式
(a-b)²(a+b)²-(a²+b²)²
=[(a-b)(a+b)]²-(a²+b²)²
=(a²-b²)²-(a²+b²)²
=(a²-b²+a²+b²)(a²-b²-a²-b²)
=2a²(-2b²)
=-4a²b²
(a-b)²(a+b)²-(a²+b²)²
=[(a-b)(a+b)+(a²+b²)][(a-b)(a+b)-(a²+b²)]
=(a²-b²+a²+b²)(a²-b²-a²-b²)
=2a²×(-2b²)
=4a²b²