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

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


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

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

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

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

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

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

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

Combine like terms: 7v + 5v = 12v
3 + 12v + -4v2 + 2v2 = 0

Combine like terms: -4v2 + 2v2 = -2v2
3 + 12v + -2v2 = 0

Solving
3 + 12v + -2v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-1.5 + -6v + v2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -6v + 1.5 + v2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -6v + v2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -6v + v2 = 0 + 1.5
-6v + v2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-6v + v2 = 1.5

The v term is -6v.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6v + 9 + v2 = 1.5 + 9

Reorder the terms:
9 + -6v + v2 = 1.5 + 9

Combine like terms: 1.5 + 9 = 10.5
9 + -6v + v2 = 10.5

Factor a perfect square on the left side:
(v + -3)(v + -3) = 10.5

Calculate the square root of the right side: 3.240370349

Break this problem into two subproblems by setting 
(v + -3) equal to 3.240370349 and -3.240370349.

Subproblem 1

v + -3 = 3.240370349 Simplifying v + -3 = 3.240370349 Reorder the terms: -3 + v = 3.240370349 Solving -3 + v = 3.240370349 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + v = 3.240370349 + 3 Combine like terms: -3 + 3 = 0 0 + v = 3.240370349 + 3 v = 3.240370349 + 3 Combine like terms: 3.240370349 + 3 = 6.240370349 v = 6.240370349 Simplifying v = 6.240370349

Subproblem 2

v + -3 = -3.240370349 Simplifying v + -3 = -3.240370349 Reorder the terms: -3 + v = -3.240370349 Solving -3 + v = -3.240370349 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + v = -3.240370349 + 3 Combine like terms: -3 + 3 = 0 0 + v = -3.240370349 + 3 v = -3.240370349 + 3 Combine like terms: -3.240370349 + 3 = -0.240370349 v = -0.240370349 Simplifying v = -0.240370349

Solution

The solution to the problem is based on the solutions from the subproblems. v = {6.240370349, -0.240370349}

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