100-121a^2=0

Solution for 100-121a^2=0 equation:

Simplifying
100 + -121a2 = 0

Solving
100 + -121a2 = 0

Solving for variable 'a'.

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

Add '-100' to each side of the equation.
100 + -100 + -121a2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + -121a2 = 0 + -100
-121a2 = 0 + -100

Combine like terms: 0 + -100 = -100
-121a2 = -100

Divide each side by '-121'.
a2 = 0.826446281

Simplifying
a2 = 0.826446281

Take the square root of each side:
a = {-0.909090909, 0.909090909}