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4(2p+3q)的平方-(3p+q)的平方
人气:321 ℃ 时间:2020-03-27 19:01:23
解答
4(2p+3q)^2-(3p+q)^2
=(4p+6q)^2-(3p+q)^2
=(4p+6q+3p+q)(4p+6q-3p-q)
=(7p+7q)(p+5q)
=7(p+q)(p+5q)
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