-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}