3v^2-27v+55=0

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Solution for 3v^2-27v+55=0 equation:


Simplifying
3v2 + -27v + 55 = 0

Reorder the terms:
55 + -27v + 3v2 = 0

Solving
55 + -27v + 3v2 = 0

Solving for variable 'v'.

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

Divide each side by '3'.
18.33333333 + -9v + v2 = 0

Move the constant term to the right:

Add '-18.33333333' to each side of the equation.
18.33333333 + -9v + -18.33333333 + v2 = 0 + -18.33333333

Reorder the terms:
18.33333333 + -18.33333333 + -9v + v2 = 0 + -18.33333333

Combine like terms: 18.33333333 + -18.33333333 = 0.00000000
0.00000000 + -9v + v2 = 0 + -18.33333333
-9v + v2 = 0 + -18.33333333

Combine like terms: 0 + -18.33333333 = -18.33333333
-9v + v2 = -18.33333333

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 = -18.33333333 + 20.25

Reorder the terms:
20.25 + -9v + v2 = -18.33333333 + 20.25

Combine like terms: -18.33333333 + 20.25 = 1.91666667
20.25 + -9v + v2 = 1.91666667

Factor a perfect square on the left side:
(v + -4.5)(v + -4.5) = 1.91666667

Calculate the square root of the right side: 1.384437312

Break this problem into two subproblems by setting 
(v + -4.5) equal to 1.384437312 and -1.384437312.

Subproblem 1

v + -4.5 = 1.384437312 Simplifying v + -4.5 = 1.384437312 Reorder the terms: -4.5 + v = 1.384437312 Solving -4.5 + v = 1.384437312 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 = 1.384437312 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = 1.384437312 + 4.5 v = 1.384437312 + 4.5 Combine like terms: 1.384437312 + 4.5 = 5.884437312 v = 5.884437312 Simplifying v = 5.884437312

Subproblem 2

v + -4.5 = -1.384437312 Simplifying v + -4.5 = -1.384437312 Reorder the terms: -4.5 + v = -1.384437312 Solving -4.5 + v = -1.384437312 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 = -1.384437312 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = -1.384437312 + 4.5 v = -1.384437312 + 4.5 Combine like terms: -1.384437312 + 4.5 = 3.115562688 v = 3.115562688 Simplifying v = 3.115562688

Solution

The solution to the problem is based on the solutions from the subproblems. v = {5.884437312, 3.115562688}

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