-1=6v+-9v^2

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Solution for -1=6v+-9v^2 equation:


Simplifying
-1 = 6v + -9v2

Solving
-1 = 6v + -9v2

Solving for variable 'v'.

Reorder the terms:
-1 + -6v + 9v2 = 6v + -6v + -9v2 + 9v2

Combine like terms: 6v + -6v = 0
-1 + -6v + 9v2 = 0 + -9v2 + 9v2
-1 + -6v + 9v2 = -9v2 + 9v2

Combine like terms: -9v2 + 9v2 = 0
-1 + -6v + 9v2 = 0

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

Divide each side by '9'.
-0.1111111111 + -0.6666666667v + v2 = 0

Move the constant term to the right:

Add '0.1111111111' to each side of the equation.
-0.1111111111 + -0.6666666667v + 0.1111111111 + v2 = 0 + 0.1111111111

Reorder the terms:
-0.1111111111 + 0.1111111111 + -0.6666666667v + v2 = 0 + 0.1111111111

Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000
0.0000000000 + -0.6666666667v + v2 = 0 + 0.1111111111
-0.6666666667v + v2 = 0 + 0.1111111111

Combine like terms: 0 + 0.1111111111 = 0.1111111111
-0.6666666667v + v2 = 0.1111111111

The v term is -0.6666666667v.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667v + 0.1111111112 + v2 = 0.1111111111 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667v + v2 = 0.1111111111 + 0.1111111112

Combine like terms: 0.1111111111 + 0.1111111112 = 0.2222222223
0.1111111112 + -0.6666666667v + v2 = 0.2222222223

Factor a perfect square on the left side:
(v + -0.3333333334)(v + -0.3333333334) = 0.2222222223

Calculate the square root of the right side: 0.471404521

Break this problem into two subproblems by setting 
(v + -0.3333333334) equal to 0.471404521 and -0.471404521.

Subproblem 1

v + -0.3333333334 = 0.471404521 Simplifying v + -0.3333333334 = 0.471404521 Reorder the terms: -0.3333333334 + v = 0.471404521 Solving -0.3333333334 + v = 0.471404521 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + v = 0.471404521 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + v = 0.471404521 + 0.3333333334 v = 0.471404521 + 0.3333333334 Combine like terms: 0.471404521 + 0.3333333334 = 0.8047378544 v = 0.8047378544 Simplifying v = 0.8047378544

Subproblem 2

v + -0.3333333334 = -0.471404521 Simplifying v + -0.3333333334 = -0.471404521 Reorder the terms: -0.3333333334 + v = -0.471404521 Solving -0.3333333334 + v = -0.471404521 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + v = -0.471404521 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + v = -0.471404521 + 0.3333333334 v = -0.471404521 + 0.3333333334 Combine like terms: -0.471404521 + 0.3333333334 = -0.1380711876 v = -0.1380711876 Simplifying v = -0.1380711876

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.8047378544, -0.1380711876}

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