(4a)(a)=72

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Solution for (4a)(a)=72 equation: 


Simplifying
(4a)(a) = 72

Remove parenthesis around (4a)
4a(a) = 72

Multiply a * a
4a2 = 72

Solving
4a2 = 72

Solving for variable 'a'.

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

Divide each side by '4'.
a2 = 18

Simplifying
a2 = 18

Take the square root of each side:
a = {-4.242640687, 4.242640687}

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