2v^2-5v=6

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Solution for 2v^2-5v=6 equation:


Simplifying
2v2 + -5v = 6

Reorder the terms:
-5v + 2v2 = 6

Solving
-5v + 2v2 = 6

Solving for variable 'v'.

Reorder the terms:
-6 + -5v + 2v2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + -5v + 2v2 = 0

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

Divide each side by '2'.
-3 + -2.5v + v2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -2.5v + 3 + v2 = 0 + 3

Reorder the terms:
-3 + 3 + -2.5v + v2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -2.5v + v2 = 0 + 3
-2.5v + v2 = 0 + 3

Combine like terms: 0 + 3 = 3
-2.5v + v2 = 3

The v term is -2.5v.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5v + 1.5625 + v2 = 3 + 1.5625

Reorder the terms:
1.5625 + -2.5v + v2 = 3 + 1.5625

Combine like terms: 3 + 1.5625 = 4.5625
1.5625 + -2.5v + v2 = 4.5625

Factor a perfect square on the left side:
(v + -1.25)(v + -1.25) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(v + -1.25) equal to 2.136000936 and -2.136000936.

Subproblem 1

v + -1.25 = 2.136000936 Simplifying v + -1.25 = 2.136000936 Reorder the terms: -1.25 + v = 2.136000936 Solving -1.25 + v = 2.136000936 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + v = 2.136000936 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + v = 2.136000936 + 1.25 v = 2.136000936 + 1.25 Combine like terms: 2.136000936 + 1.25 = 3.386000936 v = 3.386000936 Simplifying v = 3.386000936

Subproblem 2

v + -1.25 = -2.136000936 Simplifying v + -1.25 = -2.136000936 Reorder the terms: -1.25 + v = -2.136000936 Solving -1.25 + v = -2.136000936 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + v = -2.136000936 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + v = -2.136000936 + 1.25 v = -2.136000936 + 1.25 Combine like terms: -2.136000936 + 1.25 = -0.886000936 v = -0.886000936 Simplifying v = -0.886000936

Solution

The solution to the problem is based on the solutions from the subproblems. v = {3.386000936, -0.886000936}

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