81a^2-100=

Solution for 81a^2-100= equation:

Simplifying
81a2 + -100 = 0

Reorder the terms:
-100 + 81a2 = 0

Solving
-100 + 81a2 = 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 + 81a2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 81a2 = 0 + 100
81a2 = 0 + 100

Combine like terms: 0 + 100 = 100
81a2 = 100

Divide each side by '81'.
a2 = 1.234567901

Simplifying
a2 = 1.234567901

Take the square root of each side:
a = {-1.111111111, 1.111111111}