x^2-2-5.5=0

Solution for x^2-2-5.5=0 equation:

Simplifying
x2 + -2 + -5.5 = 0

Reorder the terms:
-2 + -5.5 + x2 = 0

Combine like terms: -2 + -5.5 = -7.5
-7.5 + x2 = 0

Solving
-7.5 + x2 = 0

Solving for variable 'x'.

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

Add '7.5' to each side of the equation.
-7.5 + 7.5 + x2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + x2 = 0 + 7.5
x2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
x2 = 7.5

Simplifying
x2 = 7.5

Take the square root of each side:
x = {-2.738612788, 2.738612788}