a(2a)=399

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Solution for a(2a)=399 equation: 


Simplifying
a(2a) = 399

Remove parenthesis around (2a)
a * 2a = 399

Reorder the terms for easier multiplication:
2a * a = 399

Multiply a * a
2a2 = 399

Solving
2a2 = 399

Solving for variable 'a'.

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

Divide each side by '2'.
a2 = 199.5

Simplifying
a2 = 199.5

Take the square root of each side:
a = {-14.124446892, 14.124446892}

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