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Simplifying
(16x2 + -8) = 81
Reorder the terms:
(-8 + 16x2) = 81
Remove parenthesis around (-8 + 16x2)
-8 + 16x2 = 81
Solving
-8 + 16x2 = 81
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 + 16x2 = 81 + 8
Combine like terms: -8 + 8 = 0
0 + 16x2 = 81 + 8
16x2 = 81 + 8
Combine like terms: 81 + 8 = 89
16x2 = 89
Divide each side by '16'.
x2 = 5.5625
Simplifying
x2 = 5.5625
Take the square root of each side:
x = {-2.358495283, 2.358495283}
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