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Simplifying
0 = 81x2 + -121
Reorder the terms:
0 = -121 + 81x2
Solving
0 = -121 + 81x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-81x2' to each side of the equation.
0 + -81x2 = -121 + 81x2 + -81x2
Remove the zero:
-81x2 = -121 + 81x2 + -81x2
Combine like terms: 81x2 + -81x2 = 0
-81x2 = -121 + 0
-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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