m²-4m因式分解还有一题(x²+y²)²-4x²y²

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m²-4m因式分解还有一题(x²+y²)²-4x²y²

m²-4m因式分解还有一题(x²+y²)²-4x²y²
m²-4m因式分解
还有一题
(x²+y²)²-4x²y²

m²-4m因式分解还有一题(x²+y²)²-4x²y²
m²-4m
=m(m-4)
(x²+y²)²-4x²y²
=(x²+y²+2xy)(x²+y²-2xy)
=[(x+y)(x-y)]²