90=-2x^2+8

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Solution for 90=-2x^2+8 equation:


Simplifying
90 = -2x2 + 8

Reorder the terms:
90 = 8 + -2x2

Solving
90 = 8 + -2x2

Solving for variable 'x'.

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

Add '2x2' to each side of the equation.
90 + 2x2 = 8 + -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
90 + 2x2 = 8 + 0
90 + 2x2 = 8

Add '-90' to each side of the equation.
90 + -90 + 2x2 = 8 + -90

Combine like terms: 90 + -90 = 0
0 + 2x2 = 8 + -90
2x2 = 8 + -90

Combine like terms: 8 + -90 = -82
2x2 = -82

Divide each side by '2'.
x2 = -41

Simplifying
x2 = -41

Reorder the terms:
41 + x2 = -41 + 41

Combine like terms: -41 + 41 = 0
41 + x2 = 0

The solution to this equation could not be determined.

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