5v^2-19v-3=0

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Solution for 5v^2-19v-3=0 equation:


Simplifying
5v2 + -19v + -3 = 0

Reorder the terms:
-3 + -19v + 5v2 = 0

Solving
-3 + -19v + 5v2 = 0

Solving for variable 'v'.

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

Divide each side by '5'.
-0.6 + -3.8v + v2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -3.8v + 0.6 + v2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -3.8v + v2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -3.8v + v2 = 0 + 0.6
-3.8v + v2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-3.8v + v2 = 0.6

The v term is -3.8v.  Take half its coefficient (-1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
-3.8v + 3.61 + v2 = 0.6 + 3.61

Reorder the terms:
3.61 + -3.8v + v2 = 0.6 + 3.61

Combine like terms: 0.6 + 3.61 = 4.21
3.61 + -3.8v + v2 = 4.21

Factor a perfect square on the left side:
(v + -1.9)(v + -1.9) = 4.21

Calculate the square root of the right side: 2.051828453

Break this problem into two subproblems by setting 
(v + -1.9) equal to 2.051828453 and -2.051828453.

Subproblem 1

v + -1.9 = 2.051828453 Simplifying v + -1.9 = 2.051828453 Reorder the terms: -1.9 + v = 2.051828453 Solving -1.9 + v = 2.051828453 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + v = 2.051828453 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + v = 2.051828453 + 1.9 v = 2.051828453 + 1.9 Combine like terms: 2.051828453 + 1.9 = 3.951828453 v = 3.951828453 Simplifying v = 3.951828453

Subproblem 2

v + -1.9 = -2.051828453 Simplifying v + -1.9 = -2.051828453 Reorder the terms: -1.9 + v = -2.051828453 Solving -1.9 + v = -2.051828453 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + v = -2.051828453 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + v = -2.051828453 + 1.9 v = -2.051828453 + 1.9 Combine like terms: -2.051828453 + 1.9 = -0.151828453 v = -0.151828453 Simplifying v = -0.151828453

Solution

The solution to the problem is based on the solutions from the subproblems. v = {3.951828453, -0.151828453}

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