5x(x-3)=12-4x
人气：226 ℃ 时间：2020-05-23 01:36:58
解答
5x(x-3)=12-4x
5x(x-3)+4x-12=0
5x(x-3)+4(x-3)=0
(5x+4)(x-3)=0
x=3或x=-4/5
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