v^2-19v=23

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Solution for v^2-19v=23 equation:


Simplifying
v2 + -19v = 23

Reorder the terms:
-19v + v2 = 23

Solving
-19v + v2 = 23

Solving for variable 'v'.

Reorder the terms:
-23 + -19v + v2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -19v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + -19v + 23 + v2 = 0 + 23

Reorder the terms:
-23 + 23 + -19v + v2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + -19v + v2 = 0 + 23
-19v + v2 = 0 + 23

Combine like terms: 0 + 23 = 23
-19v + v2 = 23

The v term is -19v.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19v + 90.25 + v2 = 23 + 90.25

Reorder the terms:
90.25 + -19v + v2 = 23 + 90.25

Combine like terms: 23 + 90.25 = 113.25
90.25 + -19v + v2 = 113.25

Factor a perfect square on the left side:
(v + -9.5)(v + -9.5) = 113.25

Calculate the square root of the right side: 10.641898327

Break this problem into two subproblems by setting 
(v + -9.5) equal to 10.641898327 and -10.641898327.

Subproblem 1

v + -9.5 = 10.641898327 Simplifying v + -9.5 = 10.641898327 Reorder the terms: -9.5 + v = 10.641898327 Solving -9.5 + v = 10.641898327 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + v = 10.641898327 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + v = 10.641898327 + 9.5 v = 10.641898327 + 9.5 Combine like terms: 10.641898327 + 9.5 = 20.141898327 v = 20.141898327 Simplifying v = 20.141898327

Subproblem 2

v + -9.5 = -10.641898327 Simplifying v + -9.5 = -10.641898327 Reorder the terms: -9.5 + v = -10.641898327 Solving -9.5 + v = -10.641898327 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + v = -10.641898327 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + v = -10.641898327 + 9.5 v = -10.641898327 + 9.5 Combine like terms: -10.641898327 + 9.5 = -1.141898327 v = -1.141898327 Simplifying v = -1.141898327

Solution

The solution to the problem is based on the solutions from the subproblems. v = {20.141898327, -1.141898327}

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