v^2-5v=38

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


Simplifying
v2 + -5v = 38

Reorder the terms:
-5v + v2 = 38

Solving
-5v + v2 = 38

Solving for variable 'v'.

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

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

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + -5v + 38 + v2 = 0 + 38

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

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

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

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 = 38 + 6.25

Reorder the terms:
6.25 + -5v + v2 = 38 + 6.25

Combine like terms: 38 + 6.25 = 44.25
6.25 + -5v + v2 = 44.25

Factor a perfect square on the left side:
(v + -2.5)(v + -2.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(v + -2.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

v + -2.5 = 6.652067348 Simplifying v + -2.5 = 6.652067348 Reorder the terms: -2.5 + v = 6.652067348 Solving -2.5 + v = 6.652067348 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 = 6.652067348 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + v = 6.652067348 + 2.5 v = 6.652067348 + 2.5 Combine like terms: 6.652067348 + 2.5 = 9.152067348 v = 9.152067348 Simplifying v = 9.152067348

Subproblem 2

v + -2.5 = -6.652067348 Simplifying v + -2.5 = -6.652067348 Reorder the terms: -2.5 + v = -6.652067348 Solving -2.5 + v = -6.652067348 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 = -6.652067348 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + v = -6.652067348 + 2.5 v = -6.652067348 + 2.5 Combine like terms: -6.652067348 + 2.5 = -4.152067348 v = -4.152067348 Simplifying v = -4.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. v = {9.152067348, -4.152067348}

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