-x^2-x-0.55=0

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Solution for -x^2-x-0.55=0 equation:


Simplifying
-1x2 + -1x + -0.55 = 0

Reorder the terms:
-0.55 + -1x + -1x2 = 0

Solving
-0.55 + -1x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
0.55 + x + x2 = 0

Move the constant term to the right:

Add '-0.55' to each side of the equation.
0.55 + x + -0.55 + x2 = 0 + -0.55

Reorder the terms:
0.55 + -0.55 + x + x2 = 0 + -0.55

Combine like terms: 0.55 + -0.55 = 0.00
0.00 + x + x2 = 0 + -0.55
x + x2 = 0 + -0.55

Combine like terms: 0 + -0.55 = -0.55
x + x2 = -0.55

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = -0.55 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -0.55 + 0.25

Combine like terms: -0.55 + 0.25 = -0.3
1.25 + x2 = -0.3

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -0.3

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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