81x^2-169=0

Solution for 81x^2-169=0 equation:

Simplifying
81x2 + -169 = 0

Reorder the terms:
-169 + 81x2 = 0

Solving
-169 + 81x2 = 0

Solving for variable 'x'.

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

Add '169' to each side of the equation.
-169 + 169 + 81x2 = 0 + 169

Combine like terms: -169 + 169 = 0
0 + 81x2 = 0 + 169
81x2 = 0 + 169

Combine like terms: 0 + 169 = 169
81x2 = 169

Divide each side by '81'.
x2 = 2.086419753

Simplifying
x2 = 2.086419753

Take the square root of each side:
x = {-1.444444444, 1.444444444}