(9x-3)(9x+3)=0

Solution for (9x-3)(9x+3)=0 equation:

Simplifying
(9x + -3)(9x + 3) = 0

Reorder the terms:
(-3 + 9x)(9x + 3) = 0

Reorder the terms:
(-3 + 9x)(3 + 9x) = 0

Multiply (-3 + 9x) * (3 + 9x)
(-3(3 + 9x) + 9x * (3 + 9x)) = 0
((3 * -3 + 9x * -3) + 9x * (3 + 9x)) = 0
((-9 + -27x) + 9x * (3 + 9x)) = 0
(-9 + -27x + (3 * 9x + 9x * 9x)) = 0
(-9 + -27x + (27x + 81x2)) = 0

Combine like terms: -27x + 27x = 0
(-9 + 0 + 81x2) = 0
(-9 + 81x2) = 0

Solving
-9 + 81x2 = 0

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 81x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 81x2 = 0 + 9
81x2 = 0 + 9

Combine like terms: 0 + 9 = 9
81x2 = 9

Divide each side by '81'.
x2 = 0.1111111111

Simplifying
x2 = 0.1111111111

Take the square root of each side:
x = {-0.333333333, 0.333333333}