9x^2-45=0

Solution for 9x^2-45=0 equation:

Simplifying
9x2 + -45 = 0

Reorder the terms:
-45 + 9x2 = 0

Solving
-45 + 9x2 = 0

Solving for variable 'x'.

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

Add '45' to each side of the equation.
-45 + 45 + 9x2 = 0 + 45

Combine like terms: -45 + 45 = 0
0 + 9x2 = 0 + 45
9x2 = 0 + 45

Combine like terms: 0 + 45 = 45
9x2 = 45

Divide each side by '9'.
x2 = 5

Simplifying
x2 = 5

Take the square root of each side:
x = {-2.236067978, 2.236067978}