(4v^2-9v-6)+(9v^2+5v+4)-(-7v^2+7v+5)=

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Solution for (4v^2-9v-6)+(9v^2+5v+4)-(-7v^2+7v+5)= equation:


Simplifying
(4v2 + -9v + -6) + (9v2 + 5v + 4) + -1(-7v2 + 7v + 5) = 0

Reorder the terms:
(-6 + -9v + 4v2) + (9v2 + 5v + 4) + -1(-7v2 + 7v + 5) = 0

Remove parenthesis around (-6 + -9v + 4v2)
-6 + -9v + 4v2 + (9v2 + 5v + 4) + -1(-7v2 + 7v + 5) = 0

Reorder the terms:
-6 + -9v + 4v2 + (4 + 5v + 9v2) + -1(-7v2 + 7v + 5) = 0

Remove parenthesis around (4 + 5v + 9v2)
-6 + -9v + 4v2 + 4 + 5v + 9v2 + -1(-7v2 + 7v + 5) = 0

Reorder the terms:
-6 + -9v + 4v2 + 4 + 5v + 9v2 + -1(5 + 7v + -7v2) = 0
-6 + -9v + 4v2 + 4 + 5v + 9v2 + (5 * -1 + 7v * -1 + -7v2 * -1) = 0
-6 + -9v + 4v2 + 4 + 5v + 9v2 + (-5 + -7v + 7v2) = 0

Reorder the terms:
-6 + 4 + -5 + -9v + 5v + -7v + 4v2 + 9v2 + 7v2 = 0

Combine like terms: -6 + 4 = -2
-2 + -5 + -9v + 5v + -7v + 4v2 + 9v2 + 7v2 = 0

Combine like terms: -2 + -5 = -7
-7 + -9v + 5v + -7v + 4v2 + 9v2 + 7v2 = 0

Combine like terms: -9v + 5v = -4v
-7 + -4v + -7v + 4v2 + 9v2 + 7v2 = 0

Combine like terms: -4v + -7v = -11v
-7 + -11v + 4v2 + 9v2 + 7v2 = 0

Combine like terms: 4v2 + 9v2 = 13v2
-7 + -11v + 13v2 + 7v2 = 0

Combine like terms: 13v2 + 7v2 = 20v2
-7 + -11v + 20v2 = 0

Solving
-7 + -11v + 20v2 = 0

Solving for variable 'v'.

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

Divide each side by '20'.
-0.35 + -0.55v + v2 = 0.0

Move the constant term to the right:

Add '0.35' to each side of the equation.
-0.35 + -0.55v + 0.35 + v2 = 0.0 + 0.35

Reorder the terms:
-0.35 + 0.35 + -0.55v + v2 = 0.0 + 0.35

Combine like terms: -0.35 + 0.35 = 0.00
0.00 + -0.55v + v2 = 0.0 + 0.35
-0.55v + v2 = 0.0 + 0.35

Combine like terms: 0.0 + 0.35 = 0.35
-0.55v + v2 = 0.35

The v term is -0.55v.  Take half its coefficient (-0.275).
Square it (0.075625) and add it to both sides.

Add '0.075625' to each side of the equation.
-0.55v + 0.075625 + v2 = 0.35 + 0.075625

Reorder the terms:
0.075625 + -0.55v + v2 = 0.35 + 0.075625

Combine like terms: 0.35 + 0.075625 = 0.425625
0.075625 + -0.55v + v2 = 0.425625

Factor a perfect square on the left side:
(v + -0.275)(v + -0.275) = 0.425625

Calculate the square root of the right side: 0.652399418

Break this problem into two subproblems by setting 
(v + -0.275) equal to 0.652399418 and -0.652399418.

Subproblem 1

v + -0.275 = 0.652399418 Simplifying v + -0.275 = 0.652399418 Reorder the terms: -0.275 + v = 0.652399418 Solving -0.275 + v = 0.652399418 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.275' to each side of the equation. -0.275 + 0.275 + v = 0.652399418 + 0.275 Combine like terms: -0.275 + 0.275 = 0.000 0.000 + v = 0.652399418 + 0.275 v = 0.652399418 + 0.275 Combine like terms: 0.652399418 + 0.275 = 0.927399418 v = 0.927399418 Simplifying v = 0.927399418

Subproblem 2

v + -0.275 = -0.652399418 Simplifying v + -0.275 = -0.652399418 Reorder the terms: -0.275 + v = -0.652399418 Solving -0.275 + v = -0.652399418 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.275' to each side of the equation. -0.275 + 0.275 + v = -0.652399418 + 0.275 Combine like terms: -0.275 + 0.275 = 0.000 0.000 + v = -0.652399418 + 0.275 v = -0.652399418 + 0.275 Combine like terms: -0.652399418 + 0.275 = -0.377399418 v = -0.377399418 Simplifying v = -0.377399418

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.927399418, -0.377399418}

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