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因式分解2(x+y)^2-8x^2y^2
人气:471 ℃ 时间:2020-03-27 01:28:50
解答
2(x+y)^2-8x^2y^2
=2[(x+y)²-4x²y²]
=2(x+y+2xy)(x+y-2xy)
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