0=5v^2-26v-38

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Solution for 0=5v^2-26v-38 equation:


Simplifying
0 = 5v2 + -26v + -38

Reorder the terms:
0 = -38 + -26v + 5v2

Solving
0 = -38 + -26v + 5v2

Solving for variable 'v'.

Combine like terms: 0 + 38 = 38
38 + 26v + -5v2 = -38 + -26v + 5v2 + 38 + 26v + -5v2

Reorder the terms:
38 + 26v + -5v2 = -38 + 38 + -26v + 26v + 5v2 + -5v2

Combine like terms: -38 + 38 = 0
38 + 26v + -5v2 = 0 + -26v + 26v + 5v2 + -5v2
38 + 26v + -5v2 = -26v + 26v + 5v2 + -5v2

Combine like terms: -26v + 26v = 0
38 + 26v + -5v2 = 0 + 5v2 + -5v2
38 + 26v + -5v2 = 5v2 + -5v2

Combine like terms: 5v2 + -5v2 = 0
38 + 26v + -5v2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-7.6 + -5.2v + v2 = 0

Move the constant term to the right:

Add '7.6' to each side of the equation.
-7.6 + -5.2v + 7.6 + v2 = 0 + 7.6

Reorder the terms:
-7.6 + 7.6 + -5.2v + v2 = 0 + 7.6

Combine like terms: -7.6 + 7.6 = 0.0
0.0 + -5.2v + v2 = 0 + 7.6
-5.2v + v2 = 0 + 7.6

Combine like terms: 0 + 7.6 = 7.6
-5.2v + v2 = 7.6

The v term is -5.2v.  Take half its coefficient (-2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
-5.2v + 6.76 + v2 = 7.6 + 6.76

Reorder the terms:
6.76 + -5.2v + v2 = 7.6 + 6.76

Combine like terms: 7.6 + 6.76 = 14.36
6.76 + -5.2v + v2 = 14.36

Factor a perfect square on the left side:
(v + -2.6)(v + -2.6) = 14.36

Calculate the square root of the right side: 3.789459064

Break this problem into two subproblems by setting 
(v + -2.6) equal to 3.789459064 and -3.789459064.

Subproblem 1

v + -2.6 = 3.789459064 Simplifying v + -2.6 = 3.789459064 Reorder the terms: -2.6 + v = 3.789459064 Solving -2.6 + v = 3.789459064 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + v = 3.789459064 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + v = 3.789459064 + 2.6 v = 3.789459064 + 2.6 Combine like terms: 3.789459064 + 2.6 = 6.389459064 v = 6.389459064 Simplifying v = 6.389459064

Subproblem 2

v + -2.6 = -3.789459064 Simplifying v + -2.6 = -3.789459064 Reorder the terms: -2.6 + v = -3.789459064 Solving -2.6 + v = -3.789459064 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + v = -3.789459064 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + v = -3.789459064 + 2.6 v = -3.789459064 + 2.6 Combine like terms: -3.789459064 + 2.6 = -1.189459064 v = -1.189459064 Simplifying v = -1.189459064

Solution

The solution to the problem is based on the solutions from the subproblems. v = {6.389459064, -1.189459064}

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