3u^2+27u+10=0

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Solution for 3u^2+27u+10=0 equation:


Simplifying
3u2 + 27u + 10 = 0

Reorder the terms:
10 + 27u + 3u2 = 0

Solving
10 + 27u + 3u2 = 0

Solving for variable 'u'.

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

Divide each side by '3'.
3.333333333 + 9u + u2 = 0

Move the constant term to the right:

Add '-3.333333333' to each side of the equation.
3.333333333 + 9u + -3.333333333 + u2 = 0 + -3.333333333

Reorder the terms:
3.333333333 + -3.333333333 + 9u + u2 = 0 + -3.333333333

Combine like terms: 3.333333333 + -3.333333333 = 0.000000000
0.000000000 + 9u + u2 = 0 + -3.333333333
9u + u2 = 0 + -3.333333333

Combine like terms: 0 + -3.333333333 = -3.333333333
9u + u2 = -3.333333333

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 = -3.333333333 + 20.25

Reorder the terms:
20.25 + 9u + u2 = -3.333333333 + 20.25

Combine like terms: -3.333333333 + 20.25 = 16.916666667
20.25 + 9u + u2 = 16.916666667

Factor a perfect square on the left side:
(u + 4.5)(u + 4.5) = 16.916666667

Calculate the square root of the right side: 4.11298756

Break this problem into two subproblems by setting 
(u + 4.5) equal to 4.11298756 and -4.11298756.

Subproblem 1

u + 4.5 = 4.11298756 Simplifying u + 4.5 = 4.11298756 Reorder the terms: 4.5 + u = 4.11298756 Solving 4.5 + u = 4.11298756 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + u = 4.11298756 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + u = 4.11298756 + -4.5 u = 4.11298756 + -4.5 Combine like terms: 4.11298756 + -4.5 = -0.38701244 u = -0.38701244 Simplifying u = -0.38701244

Subproblem 2

u + 4.5 = -4.11298756 Simplifying u + 4.5 = -4.11298756 Reorder the terms: 4.5 + u = -4.11298756 Solving 4.5 + u = -4.11298756 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + u = -4.11298756 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + u = -4.11298756 + -4.5 u = -4.11298756 + -4.5 Combine like terms: -4.11298756 + -4.5 = -8.61298756 u = -8.61298756 Simplifying u = -8.61298756

Solution

The solution to the problem is based on the solutions from the subproblems. u = {-0.38701244, -8.61298756}

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