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a³2(x+y)-b²(x+y) 因式分解
人气:175 ℃ 时间:2020-01-27 12:34:58
解答
a²(x+y)-b²(x+y)
=(x+y)(a²-b²)
=(x+y)(a+b)(a-b)是 a的立方2(x+y)-b的平方(x+y)a³2(x+y)-b²(x+y)=(x+y)(2a³-b²)
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