-3x^2-13=-88

Solution for -3x^2-13=-88 equation:

Simplifying
-3x2 + -13 = -88

Reorder the terms:
-13 + -3x2 = -88

Solving
-13 + -3x2 = -88

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + -3x2 = -88 + 13

Combine like terms: -13 + 13 = 0
0 + -3x2 = -88 + 13
-3x2 = -88 + 13

Combine like terms: -88 + 13 = -75
-3x2 = -75

Divide each side by '-3'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}