设x、y是有理数,并且x、y满足等式x^2+2y+√3y=17-4√3 求x+y的值
人气:449 ℃ 时间:2019-08-18 11:46:44
解答
(x² +2y) + √3 y = 17 - 4√3
∵x,y是有理数
∴ x² +2y = 17 ,y = - 4
解得 x = ±5,y= - 4
x+y = 1 或 - 9
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