(7v^2-4v-6)+(5v^2-3v+2)=

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Solution for (7v^2-4v-6)+(5v^2-3v+2)= equation:


Simplifying
(7v2 + -4v + -6) + (5v2 + -3v + 2) = 0

Reorder the terms:
(-6 + -4v + 7v2) + (5v2 + -3v + 2) = 0

Remove parenthesis around (-6 + -4v + 7v2)
-6 + -4v + 7v2 + (5v2 + -3v + 2) = 0

Reorder the terms:
-6 + -4v + 7v2 + (2 + -3v + 5v2) = 0

Remove parenthesis around (2 + -3v + 5v2)
-6 + -4v + 7v2 + 2 + -3v + 5v2 = 0

Reorder the terms:
-6 + 2 + -4v + -3v + 7v2 + 5v2 = 0

Combine like terms: -6 + 2 = -4
-4 + -4v + -3v + 7v2 + 5v2 = 0

Combine like terms: -4v + -3v = -7v
-4 + -7v + 7v2 + 5v2 = 0

Combine like terms: 7v2 + 5v2 = 12v2
-4 + -7v + 12v2 = 0

Solving
-4 + -7v + 12v2 = 0

Solving for variable 'v'.

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

Divide each side by '12'.
-0.3333333333 + -0.5833333333v + v2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.5833333333v + 0.3333333333 + v2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.5833333333v + v2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.5833333333v + v2 = 0 + 0.3333333333
-0.5833333333v + v2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.5833333333v + v2 = 0.3333333333

The v term is -0.5833333333v.  Take half its coefficient (-0.2916666667).
Square it (0.08506944446) and add it to both sides.

Add '0.08506944446' to each side of the equation.
-0.5833333333v + 0.08506944446 + v2 = 0.3333333333 + 0.08506944446

Reorder the terms:
0.08506944446 + -0.5833333333v + v2 = 0.3333333333 + 0.08506944446

Combine like terms: 0.3333333333 + 0.08506944446 = 0.41840277776
0.08506944446 + -0.5833333333v + v2 = 0.41840277776

Factor a perfect square on the left side:
(v + -0.2916666667)(v + -0.2916666667) = 0.41840277776

Calculate the square root of the right side: 0.646840612

Break this problem into two subproblems by setting 
(v + -0.2916666667) equal to 0.646840612 and -0.646840612.

Subproblem 1

v + -0.2916666667 = 0.646840612 Simplifying v + -0.2916666667 = 0.646840612 Reorder the terms: -0.2916666667 + v = 0.646840612 Solving -0.2916666667 + v = 0.646840612 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + v = 0.646840612 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + v = 0.646840612 + 0.2916666667 v = 0.646840612 + 0.2916666667 Combine like terms: 0.646840612 + 0.2916666667 = 0.9385072787 v = 0.9385072787 Simplifying v = 0.9385072787

Subproblem 2

v + -0.2916666667 = -0.646840612 Simplifying v + -0.2916666667 = -0.646840612 Reorder the terms: -0.2916666667 + v = -0.646840612 Solving -0.2916666667 + v = -0.646840612 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + v = -0.646840612 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + v = -0.646840612 + 0.2916666667 v = -0.646840612 + 0.2916666667 Combine like terms: -0.646840612 + 0.2916666667 = -0.3551739453 v = -0.3551739453 Simplifying v = -0.3551739453

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.9385072787, -0.3551739453}

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