3v^2-27v+56=0

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Solution for 3v^2-27v+56=0 equation:


Simplifying
3v2 + -27v + 56 = 0

Reorder the terms:
56 + -27v + 3v2 = 0

Solving
56 + -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'.
18.66666667 + -9v + v2 = 0

Move the constant term to the right:

Add '-18.66666667' to each side of the equation.
18.66666667 + -9v + -18.66666667 + v2 = 0 + -18.66666667

Reorder the terms:
18.66666667 + -18.66666667 + -9v + v2 = 0 + -18.66666667

Combine like terms: 18.66666667 + -18.66666667 = 0.00000000
0.00000000 + -9v + v2 = 0 + -18.66666667
-9v + v2 = 0 + -18.66666667

Combine like terms: 0 + -18.66666667 = -18.66666667
-9v + v2 = -18.66666667

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 = -18.66666667 + 20.25

Reorder the terms:
20.25 + -9v + v2 = -18.66666667 + 20.25

Combine like terms: -18.66666667 + 20.25 = 1.58333333
20.25 + -9v + v2 = 1.58333333

Factor a perfect square on the left side:
(v + -4.5)(v + -4.5) = 1.58333333

Calculate the square root of the right side: 1.258305738

Break this problem into two subproblems by setting 
(v + -4.5) equal to 1.258305738 and -1.258305738.

Subproblem 1

v + -4.5 = 1.258305738 Simplifying v + -4.5 = 1.258305738 Reorder the terms: -4.5 + v = 1.258305738 Solving -4.5 + v = 1.258305738 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 = 1.258305738 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = 1.258305738 + 4.5 v = 1.258305738 + 4.5 Combine like terms: 1.258305738 + 4.5 = 5.758305738 v = 5.758305738 Simplifying v = 5.758305738

Subproblem 2

v + -4.5 = -1.258305738 Simplifying v + -4.5 = -1.258305738 Reorder the terms: -4.5 + v = -1.258305738 Solving -4.5 + v = -1.258305738 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 = -1.258305738 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = -1.258305738 + 4.5 v = -1.258305738 + 4.5 Combine like terms: -1.258305738 + 4.5 = 3.241694262 v = 3.241694262 Simplifying v = 3.241694262

Solution

The solution to the problem is based on the solutions from the subproblems. v = {5.758305738, 3.241694262}

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