x(4x)=400

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Solution for x(4x)=400 equation: 


Simplifying
x(4x) = 400

Remove parenthesis around (4x)
x * 4x = 400

Reorder the terms for easier multiplication:
4x * x = 400

Multiply x * x
4x2 = 400

Solving
4x2 = 400

Solving for variable 'x'.

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

Divide each side by '4'.
x2 = 100

Simplifying
x2 = 100

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

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