2x^2+x^2=9

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Solution for 2x^2+x^2=9 equation: 


Simplifying
2x2 + x2 = 9

Combine like terms: 2x2 + x2 = 3x2
3x2 = 9

Solving
3x2 = 9

Solving for variable 'x'.

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

Divide each side by '3'.
x2 = 3

Simplifying
x2 = 3

Take the square root of each side:
x = {-1.732050808, 1.732050808}

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