a^2+2a^2=81

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Solution for a^2+2a^2=81 equation: 


Simplifying
a2 + 2a2 = 81

Combine like terms: a2 + 2a2 = 3a2
3a2 = 81

Solving
3a2 = 81

Solving for variable 'a'.

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

Divide each side by '3'.
a2 = 27

Simplifying
a2 = 27

Take the square root of each side:
a = {-5.196152423, 5.196152423}

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