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

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

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

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

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

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

Combine like terms: 3x + -3x = 0
3(-9 + 0 + x2) = 0
3(-9 + x2) = 0
(-9 * 3 + x2 * 3) = 0
(-27 + 3x2) = 0

Solving
-27 + 3x2 = 0

Solving for variable 'x'.

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

Add '27' to each side of the equation.
-27 + 27 + 3x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + 3x2 = 0 + 27
3x2 = 0 + 27

Combine like terms: 0 + 27 = 27
3x2 = 27

Divide each side by '3'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}