(x)(9x)-36=18(30)

Solution for (x)(9x)-36=18(30) equation:

Simplifying
(x)(9x) + -36 = 18(30)

Remove parenthesis around (9x)
x * 9x + -36 = 18(30)

Reorder the terms for easier multiplication:
9x * x + -36 = 18(30)

Multiply x * x
9x2 + -36 = 18(30)

Reorder the terms:
-36 + 9x2 = 18(30)

Multiply 18 * 30
-36 + 9x2 = 540

Solving
-36 + 9x2 = 540

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + 9x2 = 540 + 36

Combine like terms: -36 + 36 = 0
0 + 9x2 = 540 + 36
9x2 = 540 + 36

Combine like terms: 540 + 36 = 576
9x2 = 576

Divide each side by '9'.
x2 = 64

Simplifying
x2 = 64

Take the square root of each side:
x = {-8, 8}