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

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


Simplifying
(2v2 + 4v + 7) + -1(6v2 + v + 3) = 0

Reorder the terms:
(7 + 4v + 2v2) + -1(6v2 + v + 3) = 0

Remove parenthesis around (7 + 4v + 2v2)
7 + 4v + 2v2 + -1(6v2 + v + 3) = 0

Reorder the terms:
7 + 4v + 2v2 + -1(3 + v + 6v2) = 0
7 + 4v + 2v2 + (3 * -1 + v * -1 + 6v2 * -1) = 0
7 + 4v + 2v2 + (-3 + -1v + -6v2) = 0

Reorder the terms:
7 + -3 + 4v + -1v + 2v2 + -6v2 = 0

Combine like terms: 7 + -3 = 4
4 + 4v + -1v + 2v2 + -6v2 = 0

Combine like terms: 4v + -1v = 3v
4 + 3v + 2v2 + -6v2 = 0

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

Solving
4 + 3v + -4v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-1 + -0.75v + v2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.75v + 1 + v2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.75v + v2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.75v + v2 = 0 + 1
-0.75v + v2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.75v + v2 = 1

The v term is -0.75v.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75v + 0.140625 + v2 = 1 + 0.140625

Reorder the terms:
0.140625 + -0.75v + v2 = 1 + 0.140625

Combine like terms: 1 + 0.140625 = 1.140625
0.140625 + -0.75v + v2 = 1.140625

Factor a perfect square on the left side:
(v + -0.375)(v + -0.375) = 1.140625

Calculate the square root of the right side: 1.068000468

Break this problem into two subproblems by setting 
(v + -0.375) equal to 1.068000468 and -1.068000468.

Subproblem 1

v + -0.375 = 1.068000468 Simplifying v + -0.375 = 1.068000468 Reorder the terms: -0.375 + v = 1.068000468 Solving -0.375 + v = 1.068000468 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + v = 1.068000468 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + v = 1.068000468 + 0.375 v = 1.068000468 + 0.375 Combine like terms: 1.068000468 + 0.375 = 1.443000468 v = 1.443000468 Simplifying v = 1.443000468

Subproblem 2

v + -0.375 = -1.068000468 Simplifying v + -0.375 = -1.068000468 Reorder the terms: -0.375 + v = -1.068000468 Solving -0.375 + v = -1.068000468 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + v = -1.068000468 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + v = -1.068000468 + 0.375 v = -1.068000468 + 0.375 Combine like terms: -1.068000468 + 0.375 = -0.693000468 v = -0.693000468 Simplifying v = -0.693000468

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.443000468, -0.693000468}

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