9x^2-1=12

Solution for 9x^2-1=12 equation:

Simplifying
9x2 + -1 = 12

Reorder the terms:
-1 + 9x2 = 12

Solving
-1 + 9x2 = 12

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 9x2 = 12 + 1

Combine like terms: -1 + 1 = 0
0 + 9x2 = 12 + 1
9x2 = 12 + 1

Combine like terms: 12 + 1 = 13
9x2 = 13

Divide each side by '9'.
x2 = 1.444444444

Simplifying
x2 = 1.444444444

Take the square root of each side:
x = {-1.201850425, 1.201850425}