u^2+9u+86=0

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Solution for u^2+9u+86=0 equation:


Simplifying
u2 + 9u + 86 = 0

Reorder the terms:
86 + 9u + u2 = 0

Solving
86 + 9u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '-86' to each side of the equation.
86 + 9u + -86 + u2 = 0 + -86

Reorder the terms:
86 + -86 + 9u + u2 = 0 + -86

Combine like terms: 86 + -86 = 0
0 + 9u + u2 = 0 + -86
9u + u2 = 0 + -86

Combine like terms: 0 + -86 = -86
9u + u2 = -86

The u term is 9u.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9u + 20.25 + u2 = -86 + 20.25

Reorder the terms:
20.25 + 9u + u2 = -86 + 20.25

Combine like terms: -86 + 20.25 = -65.75
20.25 + 9u + u2 = -65.75

Factor a perfect square on the left side:
(u + 4.5)(u + 4.5) = -65.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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