u^2+6u-122=0

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Solution for u^2+6u-122=0 equation:


Simplifying
u2 + 6u + -122 = 0

Reorder the terms:
-122 + 6u + u2 = 0

Solving
-122 + 6u + u2 = 0

Solving for variable 'u'.

Begin completing the square.

Move the constant term to the right:

Add '122' to each side of the equation.
-122 + 6u + 122 + u2 = 0 + 122

Reorder the terms:
-122 + 122 + 6u + u2 = 0 + 122

Combine like terms: -122 + 122 = 0
0 + 6u + u2 = 0 + 122
6u + u2 = 0 + 122

Combine like terms: 0 + 122 = 122
6u + u2 = 122

The u term is 6u.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6u + 9 + u2 = 122 + 9

Reorder the terms:
9 + 6u + u2 = 122 + 9

Combine like terms: 122 + 9 = 131
9 + 6u + u2 = 131

Factor a perfect square on the left side:
(u + 3)(u + 3) = 131

Calculate the square root of the right side: 11.445523142

Break this problem into two subproblems by setting 
(u + 3) equal to 11.445523142 and -11.445523142.

Subproblem 1

u + 3 = 11.445523142 Simplifying u + 3 = 11.445523142 Reorder the terms: 3 + u = 11.445523142 Solving 3 + u = 11.445523142 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + u = 11.445523142 + -3 Combine like terms: 3 + -3 = 0 0 + u = 11.445523142 + -3 u = 11.445523142 + -3 Combine like terms: 11.445523142 + -3 = 8.445523142 u = 8.445523142 Simplifying u = 8.445523142

Subproblem 2

u + 3 = -11.445523142 Simplifying u + 3 = -11.445523142 Reorder the terms: 3 + u = -11.445523142 Solving 3 + u = -11.445523142 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + u = -11.445523142 + -3 Combine like terms: 3 + -3 = 0 0 + u = -11.445523142 + -3 u = -11.445523142 + -3 Combine like terms: -11.445523142 + -3 = -14.445523142 u = -14.445523142 Simplifying u = -14.445523142

Solution

The solution to the problem is based on the solutions from the subproblems. u = {8.445523142, -14.445523142}

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