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[(3ab-2)(3ab+2)+(2ab+2)²]/5ab= v
人气:226 ℃ 时间:2020-01-31 03:27:45
解答
(3ab-2)(3ab+2)+(2ab+2)2]/5ab
=(9a^2b^2-4+4a^2b^2+8ab+4)/5ab
=(13a^2b^2+8ab)/5ab
=13/5ab+8/5
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