2x^2-2+5.5=4

Solution for 2x^2-2+5.5=4 equation:

Simplifying
2x2 + -2 + 5.5 = 4

Reorder the terms:
-2 + 5.5 + 2x2 = 4

Combine like terms: -2 + 5.5 = 3.5
3.5 + 2x2 = 4

Solving
3.5 + 2x2 = 4

Solving for variable 'x'.

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

Add '-3.5' to each side of the equation.
3.5 + -3.5 + 2x2 = 4 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + 2x2 = 4 + -3.5
2x2 = 4 + -3.5

Combine like terms: 4 + -3.5 = 0.5
2x2 = 0.5

Divide each side by '2'.
x2 = 0.25

Simplifying
x2 = 0.25

Take the square root of each side:
x = {-0.5, 0.5}