x(3x)=1200

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Solution for x(3x)=1200 equation: 


Simplifying
x(3x) = 1200

Remove parenthesis around (3x)
x * 3x = 1200

Reorder the terms for easier multiplication:
3x * x = 1200

Multiply x * x
3x2 = 1200

Solving
3x2 = 1200

Solving for variable 'x'.

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

Divide each side by '3'.
x2 = 400

Simplifying
x2 = 400

Take the square root of each side:
x = {-20, 20}

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