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Simplifying
x2 + 8 + 16 = 81
Reorder the terms:
8 + 16 + x2 = 81
Combine like terms: 8 + 16 = 24
24 + x2 = 81
Solving
24 + x2 = 81
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-24' to each side of the equation.
24 + -24 + x2 = 81 + -24
Combine like terms: 24 + -24 = 0
0 + x2 = 81 + -24
x2 = 81 + -24
Combine like terms: 81 + -24 = 57
x2 = 57
Simplifying
x2 = 57
Take the square root of each side:
x = {-7.549834435, 7.549834435}
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