x^2-2x^2=-9

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


Simplifying
x2 + -2x2 = -9

Combine like terms: x2 + -2x2 = -1x2
-1x2 = -9

Solving
-1x2 = -9

Solving for variable 'x'.

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

Divide each side by '-1'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}

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