9*x^2-1=5

Solution for 9*x^2-1=5 equation:

Simplifying
9x2 + -1 = 5

Reorder the terms:
-1 + 9x2 = 5

Solving
-1 + 9x2 = 5

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 = 5 + 1

Combine like terms: -1 + 1 = 0
0 + 9x2 = 5 + 1
9x2 = 5 + 1

Combine like terms: 5 + 1 = 6
9x2 = 6

Divide each side by '9'.
x2 = 0.6666666667

Simplifying
x2 = 0.6666666667

Take the square root of each side:
x = {-0.816496581, 0.816496581}