-0.25x^2-x-8=0

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Solution for -0.25x^2-x-8=0 equation:


Simplifying
-0.25x2 + -1x + -8 = 0

Reorder the terms:
-8 + -1x + -0.25x2 = 0

Solving
-8 + -1x + -0.25x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.25 the coefficient of the squared term: 

Divide each side by '-0.25'.
32 + 4x + x2 = 0

Move the constant term to the right:

Add '-32' to each side of the equation.
32 + 4x + -32 + x2 = 0 + -32

Reorder the terms:
32 + -32 + 4x + x2 = 0 + -32

Combine like terms: 32 + -32 = 0
0 + 4x + x2 = 0 + -32
4x + x2 = 0 + -32

Combine like terms: 0 + -32 = -32
4x + x2 = -32

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = -32 + 4

Reorder the terms:
4 + 4x + x2 = -32 + 4

Combine like terms: -32 + 4 = -28
4 + 4x + x2 = -28

Factor a perfect square on the left side:
(x + 2)(x + 2) = -28

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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