解方程(16-2X)×(24-4X)÷2=48
人气:487 ℃ 时间:2020-04-05 08:19:57
解答
4(8-x)(6-x)=48
48-14x+x²=12
x²-14x+49=13
(x-7)²=13
x=7+√13 x=7-√13
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