-3x^2-5=-72

Solution for -3x^2-5=-72 equation:

Simplifying
-3x2 + -5 = -72

Reorder the terms:
-5 + -3x2 = -72

Solving
-5 + -3x2 = -72

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 + -3x2 = -72 + 5

Combine like terms: -5 + 5 = 0
0 + -3x2 = -72 + 5
-3x2 = -72 + 5

Combine like terms: -72 + 5 = -67
-3x2 = -67

Divide each side by '-3'.
x2 = 22.33333333

Simplifying
x2 = 22.33333333

Take the square root of each side:
x = {-4.725815626, 4.725815626}