81n^2-225=0

Solution for 81n^2-225=0 equation:

Simplifying
81n2 + -225 = 0

Reorder the terms:
-225 + 81n2 = 0

Solving
-225 + 81n2 = 0

Solving for variable 'n'.

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

Add '225' to each side of the equation.
-225 + 225 + 81n2 = 0 + 225

Combine like terms: -225 + 225 = 0
0 + 81n2 = 0 + 225
81n2 = 0 + 225

Combine like terms: 0 + 225 = 225
81n2 = 225

Divide each side by '81'.
n2 = 2.777777778

Simplifying
n2 = 2.777777778

Take the square root of each side:
n = {-1.666666667, 1.666666667}