1-81y^2=

Solution for 1-81y^2= equation:

Simplifying
1 + -81y2 = 0

Solving
1 + -81y2 = 0

Solving for variable 'y'.

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

Add '-1' to each side of the equation.
1 + -1 + -81y2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -81y2 = 0 + -1
-81y2 = 0 + -1

Combine like terms: 0 + -1 = -1
-81y2 = -1

Divide each side by '-81'.
y2 = 0.01234567901

Simplifying
y2 = 0.01234567901

Take the square root of each side:
y = {-0.111111111, 0.111111111}