3x^2+15=72

Solution for 3x^2+15=72 equation:

Simplifying
3x2 + 15 = 72

Reorder the terms:
15 + 3x2 = 72

Solving
15 + 3x2 = 72

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 = 72 + -15

Combine like terms: 15 + -15 = 0
0 + 3x2 = 72 + -15
3x2 = 72 + -15

Combine like terms: 72 + -15 = 57
3x2 = 57

Divide each side by '3'.
x2 = 19

Simplifying
x2 = 19

Take the square root of each side:
x = {-4.358898944, 4.358898944}