(3x*x)-27=0

Solution for (3x*x)-27=0 equation:

Simplifying
(3x * x) + -27 = 0

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

Reorder the terms:
-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}