81a^2-121=0

Solution for 81a^2-121=0 equation:

Simplifying
81a2 + -121 = 0

Reorder the terms:
-121 + 81a2 = 0

Solving
-121 + 81a2 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '121' to each side of the equation.
-121 + 121 + 81a2 = 0 + 121

Combine like terms: -121 + 121 = 0
0 + 81a2 = 0 + 121
81a2 = 0 + 121

Combine like terms: 0 + 121 = 121
81a2 = 121

Divide each side by '81'.
a2 = 1.49382716

Simplifying
a2 = 1.49382716

Take the square root of each side:
a = {-1.222222222, 1.222222222}