-3(-x^2+5)=39

Solution for -3(-x^2+5)=39 equation:

Simplifying
-3(-1x2 + 5) = 39

Reorder the terms:
-3(5 + -1x2) = 39
(5 * -3 + -1x2 * -3) = 39
(-15 + 3x2) = 39

Solving
-15 + 3x2 = 39

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '15' to each side of the equation.
-15 + 15 + 3x2 = 39 + 15

Combine like terms: -15 + 15 = 0
0 + 3x2 = 39 + 15
3x2 = 39 + 15

Combine like terms: 39 + 15 = 54
3x2 = 54

Divide each side by '3'.
x2 = 18

Simplifying
x2 = 18

Take the square root of each side:
x = {-4.242640687, 4.242640687}