.66x^2-36=0

Solution for .66x^2-36=0 equation:

Simplifying
0.66x2 + -36 = 0

Reorder the terms:
-36 + 0.66x2 = 0

Solving
-36 + 0.66x2 = 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 + 0.66x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 0.66x2 = 0 + 36
0.66x2 = 0 + 36

Combine like terms: 0 + 36 = 36
0.66x2 = 36

Divide each side by '0.66'.
x2 = 54.54545455

Simplifying
x2 = 54.54545455

Take the square root of each side:
x = {-7.385489459, 7.385489459}