a^2+3a^2=400

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Solution for a^2+3a^2=400 equation: 


Simplifying
a2 + 3a2 = 400

Combine like terms: a2 + 3a2 = 4a2
4a2 = 400

Solving
4a2 = 400

Solving for variable 'a'.

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

Divide each side by '4'.
a2 = 100

Simplifying
a2 = 100

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

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