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数学
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(2m²-n)(2n²-n-9)+18,因式分解
人气:466 ℃ 时间:2020-02-03 07:39:09
解答
(2n²-n)(2n²-n-9)+18
=(2n²-n)²-9(2n²-n)+18
=(2n²-n-3)(2n²-n-6)
=(2n-3)(n+1)(2n+3)(n-2)
=(n-2)(n+1)(2n-3)(2n+3)
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