3X(X-2)=6X-12
人气：409 ℃ 时间：2020-03-29 13:03:40
解答
3X(X-2)=6X-12
得3X²-6X=6X-12
移项整理得
3X²-12X+12=0
即X²-4X+4=0
即(X-2)²=0
所以X=2
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