0=.2x^2-1.6+.2

Solution for 0=.2x^2-1.6+.2 equation:

Simplifying
0 = 0.2x2 + -1.6 + 0.2

Reorder the terms:
0 = -1.6 + 0.2 + 0.2x2

Combine like terms: -1.6 + 0.2 = -1.4
0 = -1.4 + 0.2x2

Solving
0 = -1.4 + 0.2x2

Solving for variable 'x'.

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

Add '-0.2x2' to each side of the equation.
0 + -0.2x2 = -1.4 + 0.2x2 + -0.2x2
Remove the zero:
-0.2x2 = -1.4 + 0.2x2 + -0.2x2

Combine like terms: 0.2x2 + -0.2x2 = 0.0
-0.2x2 = -1.4 + 0.0
-0.2x2 = -1.4

Divide each side by '-0.2'.
x2 = 7

Simplifying
x2 = 7

Take the square root of each side:
x = {-2.645751311, 2.645751311}