12v^2+11v=13

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Solution for 12v^2+11v=13 equation:


Simplifying
12v2 + 11v = 13

Reorder the terms:
11v + 12v2 = 13

Solving
11v + 12v2 = 13

Solving for variable 'v'.

Reorder the terms:
-13 + 11v + 12v2 = 13 + -13

Combine like terms: 13 + -13 = 0
-13 + 11v + 12v2 = 0

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

Divide each side by '12'.
-1.083333333 + 0.9166666667v + v2 = 0

Move the constant term to the right:

Add '1.083333333' to each side of the equation.
-1.083333333 + 0.9166666667v + 1.083333333 + v2 = 0 + 1.083333333

Reorder the terms:
-1.083333333 + 1.083333333 + 0.9166666667v + v2 = 0 + 1.083333333

Combine like terms: -1.083333333 + 1.083333333 = 0.000000000
0.000000000 + 0.9166666667v + v2 = 0 + 1.083333333
0.9166666667v + v2 = 0 + 1.083333333

Combine like terms: 0 + 1.083333333 = 1.083333333
0.9166666667v + v2 = 1.083333333

The v term is 0.9166666667v.  Take half its coefficient (0.4583333334).
Square it (0.2100694445) and add it to both sides.

Add '0.2100694445' to each side of the equation.
0.9166666667v + 0.2100694445 + v2 = 1.083333333 + 0.2100694445

Reorder the terms:
0.2100694445 + 0.9166666667v + v2 = 1.083333333 + 0.2100694445

Combine like terms: 1.083333333 + 0.2100694445 = 1.2934027775
0.2100694445 + 0.9166666667v + v2 = 1.2934027775

Factor a perfect square on the left side:
(v + 0.4583333334)(v + 0.4583333334) = 1.2934027775

Calculate the square root of the right side: 1.137278672

Break this problem into two subproblems by setting 
(v + 0.4583333334) equal to 1.137278672 and -1.137278672.

Subproblem 1

v + 0.4583333334 = 1.137278672 Simplifying v + 0.4583333334 = 1.137278672 Reorder the terms: 0.4583333334 + v = 1.137278672 Solving 0.4583333334 + v = 1.137278672 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.4583333334' to each side of the equation. 0.4583333334 + -0.4583333334 + v = 1.137278672 + -0.4583333334 Combine like terms: 0.4583333334 + -0.4583333334 = 0.0000000000 0.0000000000 + v = 1.137278672 + -0.4583333334 v = 1.137278672 + -0.4583333334 Combine like terms: 1.137278672 + -0.4583333334 = 0.6789453386 v = 0.6789453386 Simplifying v = 0.6789453386

Subproblem 2

v + 0.4583333334 = -1.137278672 Simplifying v + 0.4583333334 = -1.137278672 Reorder the terms: 0.4583333334 + v = -1.137278672 Solving 0.4583333334 + v = -1.137278672 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.4583333334' to each side of the equation. 0.4583333334 + -0.4583333334 + v = -1.137278672 + -0.4583333334 Combine like terms: 0.4583333334 + -0.4583333334 = 0.0000000000 0.0000000000 + v = -1.137278672 + -0.4583333334 v = -1.137278672 + -0.4583333334 Combine like terms: -1.137278672 + -0.4583333334 = -1.5956120054 v = -1.5956120054 Simplifying v = -1.5956120054

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.6789453386, -1.5956120054}

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