81x^2-4=4

Solution for 81x^2-4=4 equation:

Simplifying
81x2 + -4 = 4

Reorder the terms:
-4 + 81x2 = 4

Solving
-4 + 81x2 = 4

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 81x2 = 4 + 4

Combine like terms: -4 + 4 = 0
0 + 81x2 = 4 + 4
81x2 = 4 + 4

Combine like terms: 4 + 4 = 8
81x2 = 8

Divide each side by '81'.
x2 = 0.0987654321

Simplifying
x2 = 0.0987654321

Take the square root of each side:
x = {-0.314269681, 0.314269681}