900=((3x)*(3x))

Solution for 900=((3x)*(3x)) equation:

Simplifying
900 = ((3x)(3x))

Remove parenthesis around (3x)
900 = (3x(3x))

Remove parenthesis around (3x)
900 = (3x * 3x)

Reorder the terms for easier multiplication:
900 = (3 * 3x * x)

Multiply 3 * 3
900 = (9x * x)

Multiply x * x
900 = (9x2)

Solving
900 = (9x2)

Solving for variable 'x'.

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

Add '(-9x2)' to each side of the equation.
900 + (-9x2) = (9x2) + (-9x2)

Combine like terms: (9x2) + (-9x2) = 0
900 + (-9x2) = 0

Add '-900' to each side of the equation.
900 + -900 + (-9x2) = 0 + -900

Combine like terms: 900 + -900 = 0
0 + (-9x2) = 0 + -900
(-9x2) = 0 + -900

Combine like terms: 0 + -900 = -900
(-9x2) = -900

Divide each side by '-9'.
x2 = 100

Simplifying
x2 = 100

Take the square root of each side:
x = {-10, 10}