9x^2-1=3

Solution for 9x^2-1=3 equation:

Simplifying
9x2 + -1 = 3

Reorder the terms:
-1 + 9x2 = 3

Solving
-1 + 9x2 = 3

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 = 3 + 1

Combine like terms: -1 + 1 = 0
0 + 9x2 = 3 + 1
9x2 = 3 + 1

Combine like terms: 3 + 1 = 4
9x2 = 4

Divide each side by '9'.
x2 = 0.4444444444

Simplifying
x2 = 0.4444444444

Take the square root of each side:
x = {-0.666666667, 0.666666667}