36-81x^2=0

Solution for 36-81x^2=0 equation:

Simplifying
36 + -81x2 = 0

Solving
36 + -81x2 = 0

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + -81x2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -81x2 = 0 + -36
-81x2 = 0 + -36

Combine like terms: 0 + -36 = -36
-81x2 = -36

Divide each side by '-81'.
x2 = 0.4444444444

Simplifying
x2 = 0.4444444444

Take the square root of each side:
x = {-0.666666667, 0.666666667}