x^2+2x^2=40

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Solution for x^2+2x^2=40 equation: 


Simplifying
x2 + 2x2 = 40

Combine like terms: x2 + 2x2 = 3x2
3x2 = 40

Solving
3x2 = 40

Solving for variable 'x'.

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

Divide each side by '3'.
x2 = 13.33333333

Simplifying
x2 = 13.33333333

Take the square root of each side:
x = {-3.651483716, 3.651483716}

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