25=81x^2

Solution for 25=81x^2 equation:

Simplifying
25 = 81x2

Solving
25 = 81x2

Solving for variable 'x'.

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

Add '-81x2' to each side of the equation.
25 + -81x2 = 81x2 + -81x2

Combine like terms: 81x2 + -81x2 = 0
25 + -81x2 = 0

Add '-25' to each side of the equation.
25 + -25 + -81x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -81x2 = 0 + -25
-81x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-81x2 = -25

Divide each side by '-81'.
x2 = 0.3086419753

Simplifying
x2 = 0.3086419753

Take the square root of each side:
x = {-0.555555556, 0.555555556}