4x^2-72=0

Solution for 4x^2-72=0 equation:

Simplifying
4x2 + -72 = 0

Reorder the terms:
-72 + 4x2 = 0

Solving
-72 + 4x2 = 0

Solving for variable 'x'.

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

Add '72' to each side of the equation.
-72 + 72 + 4x2 = 0 + 72

Combine like terms: -72 + 72 = 0
0 + 4x2 = 0 + 72
4x2 = 0 + 72

Combine like terms: 0 + 72 = 72
4x2 = 72

Divide each side by '4'.
x2 = 18

Simplifying
x2 = 18

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