6-.33x^2=-20

Solution for 6-.33x^2=-20 equation:

Simplifying
6 + -0.33x2 = -20

Solving
6 + -0.33x2 = -20

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + -0.33x2 = -20 + -6

Combine like terms: 6 + -6 = 0
0 + -0.33x2 = -20 + -6
-0.33x2 = -20 + -6

Combine like terms: -20 + -6 = -26
-0.33x2 = -26

Divide each side by '-0.33'.
x2 = 78.78787879

Simplifying
x2 = 78.78787879

Take the square root of each side:
x = {-8.876253646, 8.876253646}