8
8x^2 - 24 = 3x^2 - 9;
8x^2 - 3x^2 = -9 + 24;
5x^2 = 15;
5x^2 - 15 = 0;
5(x^2 - 3) = 0;
x = - sqrt 3 or x = sqrt 3
Added 7/17/2014 7:45:27 AM
This answer has been confirmed as correct and helpful.
8
(x + 3)(x - 3) = 16 - 2x^2;
x^2 - 9 = 16 - 2x^2;
x^2 + 2x^2 = 16 + 9;
3x^2 = 25;
3x^2 - 25 = 0;
x = -5/sqrt 3 or x = 5/sqrt 3
Added 7/17/2014 7:48:42 AM
This answer has been confirmed as correct and helpful.
