v^2+9v+6=0

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Solution for v^2+9v+6=0 equation:


Simplifying
v2 + 9v + 6 = 0

Reorder the terms:
6 + 9v + v2 = 0

Solving
6 + 9v + v2 = 0

Solving for variable 'v'.

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 9v + -6 + v2 = 0 + -6

Reorder the terms:
6 + -6 + 9v + v2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 9v + v2 = 0 + -6
9v + v2 = 0 + -6

Combine like terms: 0 + -6 = -6
9v + v2 = -6

The v term is 9v.  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.
9v + 20.25 + v2 = -6 + 20.25

Reorder the terms:
20.25 + 9v + v2 = -6 + 20.25

Combine like terms: -6 + 20.25 = 14.25
20.25 + 9v + v2 = 14.25

Factor a perfect square on the left side:
(v + 4.5)(v + 4.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(v + 4.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

v + 4.5 = 3.774917218 Simplifying v + 4.5 = 3.774917218 Reorder the terms: 4.5 + v = 3.774917218 Solving 4.5 + v = 3.774917218 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + v = 3.774917218 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + v = 3.774917218 + -4.5 v = 3.774917218 + -4.5 Combine like terms: 3.774917218 + -4.5 = -0.725082782 v = -0.725082782 Simplifying v = -0.725082782

Subproblem 2

v + 4.5 = -3.774917218 Simplifying v + 4.5 = -3.774917218 Reorder the terms: 4.5 + v = -3.774917218 Solving 4.5 + v = -3.774917218 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + v = -3.774917218 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + v = -3.774917218 + -4.5 v = -3.774917218 + -4.5 Combine like terms: -3.774917218 + -4.5 = -8.274917218 v = -8.274917218 Simplifying v = -8.274917218

Solution

The solution to the problem is based on the solutions from the subproblems. v = {-0.725082782, -8.274917218}

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