(6v^2+3v)-(-4v^2-3v+7)=

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Solution for (6v^2+3v)-(-4v^2-3v+7)= equation:


Simplifying
(6v2 + 3v) + -1(-4v2 + -3v + 7) = 0

Reorder the terms:
(3v + 6v2) + -1(-4v2 + -3v + 7) = 0

Remove parenthesis around (3v + 6v2)
3v + 6v2 + -1(-4v2 + -3v + 7) = 0

Reorder the terms:
3v + 6v2 + -1(7 + -3v + -4v2) = 0
3v + 6v2 + (7 * -1 + -3v * -1 + -4v2 * -1) = 0
3v + 6v2 + (-7 + 3v + 4v2) = 0

Reorder the terms:
-7 + 3v + 3v + 6v2 + 4v2 = 0

Combine like terms: 3v + 3v = 6v
-7 + 6v + 6v2 + 4v2 = 0

Combine like terms: 6v2 + 4v2 = 10v2
-7 + 6v + 10v2 = 0

Solving
-7 + 6v + 10v2 = 0

Solving for variable 'v'.

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

Divide each side by '10'.
-0.7 + 0.6v + v2 = 0.0

Move the constant term to the right:

Add '0.7' to each side of the equation.
-0.7 + 0.6v + 0.7 + v2 = 0.0 + 0.7

Reorder the terms:
-0.7 + 0.7 + 0.6v + v2 = 0.0 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + 0.6v + v2 = 0.0 + 0.7
0.6v + v2 = 0.0 + 0.7

Combine like terms: 0.0 + 0.7 = 0.7
0.6v + v2 = 0.7

The v term is 0.6v.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6v + 0.09 + v2 = 0.7 + 0.09

Reorder the terms:
0.09 + 0.6v + v2 = 0.7 + 0.09

Combine like terms: 0.7 + 0.09 = 0.79
0.09 + 0.6v + v2 = 0.79

Factor a perfect square on the left side:
(v + 0.3)(v + 0.3) = 0.79

Calculate the square root of the right side: 0.888819442

Break this problem into two subproblems by setting 
(v + 0.3) equal to 0.888819442 and -0.888819442.

Subproblem 1

v + 0.3 = 0.888819442 Simplifying v + 0.3 = 0.888819442 Reorder the terms: 0.3 + v = 0.888819442 Solving 0.3 + v = 0.888819442 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + v = 0.888819442 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + v = 0.888819442 + -0.3 v = 0.888819442 + -0.3 Combine like terms: 0.888819442 + -0.3 = 0.588819442 v = 0.588819442 Simplifying v = 0.588819442

Subproblem 2

v + 0.3 = -0.888819442 Simplifying v + 0.3 = -0.888819442 Reorder the terms: 0.3 + v = -0.888819442 Solving 0.3 + v = -0.888819442 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + v = -0.888819442 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + v = -0.888819442 + -0.3 v = -0.888819442 + -0.3 Combine like terms: -0.888819442 + -0.3 = -1.188819442 v = -1.188819442 Simplifying v = -1.188819442

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.588819442, -1.188819442}

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