求大神解答(因式分解):(x²+y²)²-4x²y²
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求大神解答(因式分解):(x²+y²)²-4x²y²
求大神解答(因式分解):(x²+y²)²-4x²y²
求大神解答(因式分解):(x²+y²)²-4x²y²
(x²+y²)²-4x²y²
=(x^2+y^2+2xy)(x^2+y^2-2xy)
=(x+y)^2(x-y)^2