4x^2-225=0

Solution for 4x^2-225=0 equation:

Simplifying
4x2 + -225 = 0

Reorder the terms:
-225 + 4x2 = 0

Solving
-225 + 4x2 = 0

Solving for variable 'x'.

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

Add '225' to each side of the equation.
-225 + 225 + 4x2 = 0 + 225

Combine like terms: -225 + 225 = 0
0 + 4x2 = 0 + 225
4x2 = 0 + 225

Combine like terms: 0 + 225 = 225
4x2 = 225

Divide each side by '4'.
x2 = 56.25

Simplifying
x2 = 56.25

Take the square root of each side:
x = {-7.5, 7.5}