4v^2+20v+11=0

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Solution for 4v^2+20v+11=0 equation:


Simplifying
4v2 + 20v + 11 = 0

Reorder the terms:
11 + 20v + 4v2 = 0

Solving
11 + 20v + 4v2 = 0

Solving for variable 'v'.

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

Divide each side by '4'.
2.75 + 5v + v2 = 0

Move the constant term to the right:

Add '-2.75' to each side of the equation.
2.75 + 5v + -2.75 + v2 = 0 + -2.75

Reorder the terms:
2.75 + -2.75 + 5v + v2 = 0 + -2.75

Combine like terms: 2.75 + -2.75 = 0.00
0.00 + 5v + v2 = 0 + -2.75
5v + v2 = 0 + -2.75

Combine like terms: 0 + -2.75 = -2.75
5v + v2 = -2.75

The v term is 5v.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5v + 6.25 + v2 = -2.75 + 6.25

Reorder the terms:
6.25 + 5v + v2 = -2.75 + 6.25

Combine like terms: -2.75 + 6.25 = 3.5
6.25 + 5v + v2 = 3.5

Factor a perfect square on the left side:
(v + 2.5)(v + 2.5) = 3.5

Calculate the square root of the right side: 1.870828693

Break this problem into two subproblems by setting 
(v + 2.5) equal to 1.870828693 and -1.870828693.

Subproblem 1

v + 2.5 = 1.870828693 Simplifying v + 2.5 = 1.870828693 Reorder the terms: 2.5 + v = 1.870828693 Solving 2.5 + v = 1.870828693 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + v = 1.870828693 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + v = 1.870828693 + -2.5 v = 1.870828693 + -2.5 Combine like terms: 1.870828693 + -2.5 = -0.629171307 v = -0.629171307 Simplifying v = -0.629171307

Subproblem 2

v + 2.5 = -1.870828693 Simplifying v + 2.5 = -1.870828693 Reorder the terms: 2.5 + v = -1.870828693 Solving 2.5 + v = -1.870828693 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + v = -1.870828693 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + v = -1.870828693 + -2.5 v = -1.870828693 + -2.5 Combine like terms: -1.870828693 + -2.5 = -4.370828693 v = -4.370828693 Simplifying v = -4.370828693

Solution

The solution to the problem is based on the solutions from the subproblems. v = {-0.629171307, -4.370828693}

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