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(4a+3b)(a-2b)-(3a-2b).a
人气:204 ℃ 时间:2020-03-29 10:20:55
解答
(4a+3b)(a-2b)-(3a-2b).a
= 4a²-6b²+3ab-8ab - 3a²+2ab
= a²-3ab -6b²
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