x(2x)=18

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Solution for x(2x)=18 equation: 


Simplifying
x(2x) = 18

Remove parenthesis around (2x)
x * 2x = 18

Reorder the terms for easier multiplication:
2x * x = 18

Multiply x * x
2x2 = 18

Solving
2x2 = 18

Solving for variable 'x'.

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

Divide each side by '2'.
x2 = 9

Simplifying
x2 = 9

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

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