2v^2+11v-20=0

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


Simplifying
2v2 + 11v + -20 = 0

Reorder the terms:
-20 + 11v + 2v2 = 0

Solving
-20 + 11v + 2v2 = 0

Solving for variable 'v'.

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

Divide each side by '2'.
-10 + 5.5v + v2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 5.5v + 10 + v2 = 0 + 10

Reorder the terms:
-10 + 10 + 5.5v + v2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 5.5v + v2 = 0 + 10
5.5v + v2 = 0 + 10

Combine like terms: 0 + 10 = 10
5.5v + v2 = 10

The v term is 5.5v.  Take half its coefficient (2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
5.5v + 7.5625 + v2 = 10 + 7.5625

Reorder the terms:
7.5625 + 5.5v + v2 = 10 + 7.5625

Combine like terms: 10 + 7.5625 = 17.5625
7.5625 + 5.5v + v2 = 17.5625

Factor a perfect square on the left side:
(v + 2.75)(v + 2.75) = 17.5625

Calculate the square root of the right side: 4.190763654

Break this problem into two subproblems by setting 
(v + 2.75) equal to 4.190763654 and -4.190763654.

Subproblem 1

v + 2.75 = 4.190763654 Simplifying v + 2.75 = 4.190763654 Reorder the terms: 2.75 + v = 4.190763654 Solving 2.75 + v = 4.190763654 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + v = 4.190763654 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + v = 4.190763654 + -2.75 v = 4.190763654 + -2.75 Combine like terms: 4.190763654 + -2.75 = 1.440763654 v = 1.440763654 Simplifying v = 1.440763654

Subproblem 2

v + 2.75 = -4.190763654 Simplifying v + 2.75 = -4.190763654 Reorder the terms: 2.75 + v = -4.190763654 Solving 2.75 + v = -4.190763654 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + v = -4.190763654 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + v = -4.190763654 + -2.75 v = -4.190763654 + -2.75 Combine like terms: -4.190763654 + -2.75 = -6.940763654 v = -6.940763654 Simplifying v = -6.940763654

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.440763654, -6.940763654}

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