80(1—x)²=64.8怎么算?
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80(1—x)²=64.8怎么算?
80(1—x)²=64.8怎么算?
80(1—x)²=64.8怎么算?
64.8/80开跟号然后你还不会?用计算器吧
64.8/80= 0.81 0.81开平方=0.9
1-x=0.9
x=0.1
(1-x)^2=64.8÷80=0.81
1-x=+-根号0.81
1-x=+-0.9
x1=1-0.9=0.1
x2=1+0.9=1.9
已解,求采纳O(∩_∩)O谢谢