9x^2=-5x-8

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Solution for 9x^2=-5x-8 equation:


Simplifying
9x2 = -5x + -8

Reorder the terms:
9x2 = -8 + -5x

Solving
9x2 = -8 + -5x

Solving for variable 'x'.

Reorder the terms:
8 + 5x + 9x2 = -8 + -5x + 8 + 5x

Reorder the terms:
8 + 5x + 9x2 = -8 + 8 + -5x + 5x

Combine like terms: -8 + 8 = 0
8 + 5x + 9x2 = 0 + -5x + 5x
8 + 5x + 9x2 = -5x + 5x

Combine like terms: -5x + 5x = 0
8 + 5x + 9x2 = 0

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

Divide each side by '9'.
0.8888888889 + 0.5555555556x + x2 = 0

Move the constant term to the right:

Add '-0.8888888889' to each side of the equation.
0.8888888889 + 0.5555555556x + -0.8888888889 + x2 = 0 + -0.8888888889

Reorder the terms:
0.8888888889 + -0.8888888889 + 0.5555555556x + x2 = 0 + -0.8888888889

Combine like terms: 0.8888888889 + -0.8888888889 = 0.0000000000
0.0000000000 + 0.5555555556x + x2 = 0 + -0.8888888889
0.5555555556x + x2 = 0 + -0.8888888889

Combine like terms: 0 + -0.8888888889 = -0.8888888889
0.5555555556x + x2 = -0.8888888889

The x term is 0.5555555556x.  Take half its coefficient (0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
0.5555555556x + 0.07716049384 + x2 = -0.8888888889 + 0.07716049384

Reorder the terms:
0.07716049384 + 0.5555555556x + x2 = -0.8888888889 + 0.07716049384

Combine like terms: -0.8888888889 + 0.07716049384 = -0.81172839506
0.07716049384 + 0.5555555556x + x2 = -0.81172839506

Factor a perfect square on the left side:
(x + 0.2777777778)(x + 0.2777777778) = -0.81172839506

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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