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Simplifying
81x2 + -121 = 0
Reorder the terms:
-121 + 81x2 = 0
Solving
-121 + 81x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '121' to each side of the equation.
-121 + 121 + 81x2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 81x2 = 0 + 121
81x2 = 0 + 121
Combine like terms: 0 + 121 = 121
81x2 = 121
Divide each side by '81'.
x2 = 1.49382716
Simplifying
x2 = 1.49382716
Take the square root of each side:
x = {-1.222222222, 1.222222222}
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