(2+根号2)X=4
解它
过程
解:根号2约等于1.4
(2+1.4)X=4
3.4X=4
X=4/3.4
X约等于1.18
X=4/(2+根号2)
X=4*(2-根号2)/[(2+根号2)*(2-根号2)]
X=4-2*根号2