06-21-2017, 09:28 AM
(This post was last modified: 06-21-2017, 09:29 AM by Dane Regan.)
Voted
If x^2 + y^2 + z^2 = -155
And xyz = 298
Vote number = x + y + z
[spoiler]21
(x + y + z)^2 = x^2 + y^2 + z^2 + 2xyz = -155 + 2*298 = 441
So x + y + z = 21[/spoiler]
If x^2 + y^2 + z^2 = -155
And xyz = 298
Vote number = x + y + z
[spoiler]21
(x + y + z)^2 = x^2 + y^2 + z^2 + 2xyz = -155 + 2*298 = 441
So x + y + z = 21[/spoiler]