8x^2+8x=-5

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Solution for 8x^2+8x=-5 equation:


Simplifying
8x2 + 8x = -5

Reorder the terms:
8x + 8x2 = -5

Solving
8x + 8x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + 8x + 8x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 8x + 8x2 = 0

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

Divide each side by '8'.
0.625 + x + x2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + x + -0.625 + x2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + x + x2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + x + x2 = 0 + -0.625
x + x2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
x + x2 = -0.625

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 = -0.625 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -0.625 + 0.25

Combine like terms: -0.625 + 0.25 = -0.375
1.25 + x2 = -0.375

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -0.375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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