-10-2x^2=-90

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Solution for -10-2x^2=-90 equation: 


Simplifying
-10 + -2x2 = -90

Solving
-10 + -2x2 = -90

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + -2x2 = -90 + 10

Combine like terms: -10 + 10 = 0
0 + -2x2 = -90 + 10
-2x2 = -90 + 10

Combine like terms: -90 + 10 = -80
-2x2 = -80

Divide each side by '-2'.
x2 = 40

Simplifying
x2 = 40

Take the square root of each side:
x = {-6.32455532, 6.32455532}

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