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x的平方减x减16分之5=0
用配方法解!谢谢了
人气:401 ℃ 时间:2020-04-08 11:57:30
解答
x²-x-5/16=0
(x-1/2)²-1/16=0
x-1/2=1/4
x=3/4
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