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分解因式x^2+2xy+y^2+2x+2y-3
人气:386 ℃ 时间:2020-05-22 11:29:13
解答
x^2+2xy+y^2+2x+2y-3
=(x+y)²+2(x+y)+3
=(x+y+3)(x+y-1)
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