81y^2-144=0

Solution for 81y^2-144=0 equation:

Simplifying
81y2 + -144 = 0

Reorder the terms:
-144 + 81y2 = 0

Solving
-144 + 81y2 = 0

Solving for variable 'y'.

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

Add '144' to each side of the equation.
-144 + 144 + 81y2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 81y2 = 0 + 144
81y2 = 0 + 144

Combine like terms: 0 + 144 = 144
81y2 = 144

Divide each side by '81'.
y2 = 1.777777778

Simplifying
y2 = 1.777777778

Take the square root of each side:
y = {-1.333333333, 1.333333333}