v^2+9v+6=8

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Solution for v^2+9v+6=8 equation:


Simplifying
v2 + 9v + 6 = 8

Reorder the terms:
6 + 9v + v2 = 8

Solving
6 + 9v + v2 = 8

Solving for variable 'v'.

Reorder the terms:
6 + -8 + 9v + v2 = 8 + -8

Combine like terms: 6 + -8 = -2
-2 + 9v + v2 = 8 + -8

Combine like terms: 8 + -8 = 0
-2 + 9v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 9v + 2 + v2 = 0 + 2

Reorder the terms:
-2 + 2 + 9v + v2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 9v + v2 = 0 + 2
9v + v2 = 0 + 2

Combine like terms: 0 + 2 = 2
9v + v2 = 2

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 = 2 + 20.25

Reorder the terms:
20.25 + 9v + v2 = 2 + 20.25

Combine like terms: 2 + 20.25 = 22.25
20.25 + 9v + v2 = 22.25

Factor a perfect square on the left side:
(v + 4.5)(v + 4.5) = 22.25

Calculate the square root of the right side: 4.716990566

Break this problem into two subproblems by setting 
(v + 4.5) equal to 4.716990566 and -4.716990566.

Subproblem 1

v + 4.5 = 4.716990566 Simplifying v + 4.5 = 4.716990566 Reorder the terms: 4.5 + v = 4.716990566 Solving 4.5 + v = 4.716990566 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 = 4.716990566 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + v = 4.716990566 + -4.5 v = 4.716990566 + -4.5 Combine like terms: 4.716990566 + -4.5 = 0.216990566 v = 0.216990566 Simplifying v = 0.216990566

Subproblem 2

v + 4.5 = -4.716990566 Simplifying v + 4.5 = -4.716990566 Reorder the terms: 4.5 + v = -4.716990566 Solving 4.5 + v = -4.716990566 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 = -4.716990566 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + v = -4.716990566 + -4.5 v = -4.716990566 + -4.5 Combine like terms: -4.716990566 + -4.5 = -9.216990566 v = -9.216990566 Simplifying v = -9.216990566

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.216990566, -9.216990566}

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