3
6x^2 + 1 = 13;
6x^2 + 1 - 13 = 0;
6x^2 - 12 = 0;
6(x^2 - 2) = 0
x = - sqrt 2 or x = sqrt 2
Added 7/18/2014 4:15:43 AM
This answer has been confirmed as correct and helpful.
3
5x^2 - 55 = 90;
5x^2 - 55 - 90 = 0;
5x^2 - 145 = 0;
5(x^2 - 29) = 0;
x = - sqrt 29 or x = sqrt 29
Added 7/18/2014 4:17:26 AM
This answer has been confirmed as correct and helpful.
