化简 (a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)因式分解 (x²+4y²)²-16x²y²
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化简 (a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)因式分解 (x²+4y²)²-16x²y²
化简 (a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)
因式分解 (x²+4y²)²-16x²y²
化简 (a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)因式分解 (x²+4y²)²-16x²y²
(1)=(a²-b²)(a+b)-(a²-b²)(a-b)+2b(a²+b²)=(a²-b²)(a+b-a+b)+2b(a²+b²)
=2b(a²-b²)+2b(a²+b²)=2b(a²-b²+a²+b²)=2b*2a²=4a²b