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Simplifying
2x2 + 8 = 90
Reorder the terms:
8 + 2x2 = 90
Solving
8 + 2x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 2x2 = 90 + -8
Combine like terms: 8 + -8 = 0
0 + 2x2 = 90 + -8
2x2 = 90 + -8
Combine like terms: 90 + -8 = 82
2x2 = 82
Divide each side by '2'.
x2 = 41
Simplifying
x2 = 41
Take the square root of each side:
x = {-6.403124237, 6.403124237}
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