5-(2x^2)=-15

Solution for 5-(2x^2)=-15 equation:

Simplifying
5 + -1(2x2) = -15

Remove parenthesis around (2x2)
5 + -1 * 2x2 = -15

Multiply -1 * 2
5 + -2x2 = -15

Solving
5 + -2x2 = -15

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + -2x2 = -15 + -5

Combine like terms: 5 + -5 = 0
0 + -2x2 = -15 + -5
-2x2 = -15 + -5

Combine like terms: -15 + -5 = -20
-2x2 = -20

Divide each side by '-2'.
x2 = 10

Simplifying
x2 = 10

Take the square root of each side:
x = {-3.16227766, 3.16227766}