(v^2-2v+6)+(-7v^2+3v+4)=0

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Solution for (v^2-2v+6)+(-7v^2+3v+4)=0 equation:


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

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

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

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

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

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

Combine like terms: 6 + 4 = 10
10 + -2v + 3v + v2 + -7v2 = 0

Combine like terms: -2v + 3v = 1v
10 + 1v + v2 + -7v2 = 0

Combine like terms: v2 + -7v2 = -6v2
10 + 1v + -6v2 = 0

Solving
10 + 1v + -6v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
-1.666666667 + -0.1666666667v + v2 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + -0.1666666667v + 1.666666667 + v2 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + -0.1666666667v + v2 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + -0.1666666667v + v2 = 0 + 1.666666667
-0.1666666667v + v2 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
-0.1666666667v + v2 = 1.666666667

The v term is -0.1666666667v.  Take half its coefficient (-0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
-0.1666666667v + 0.006944444447 + v2 = 1.666666667 + 0.006944444447

Reorder the terms:
0.006944444447 + -0.1666666667v + v2 = 1.666666667 + 0.006944444447

Combine like terms: 1.666666667 + 0.006944444447 = 1.673611111447
0.006944444447 + -0.1666666667v + v2 = 1.673611111447

Factor a perfect square on the left side:
(v + -0.08333333335)(v + -0.08333333335) = 1.673611111447

Calculate the square root of the right side: 1.293681225

Break this problem into two subproblems by setting 
(v + -0.08333333335) equal to 1.293681225 and -1.293681225.

Subproblem 1

v + -0.08333333335 = 1.293681225 Simplifying v + -0.08333333335 = 1.293681225 Reorder the terms: -0.08333333335 + v = 1.293681225 Solving -0.08333333335 + v = 1.293681225 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + v = 1.293681225 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + v = 1.293681225 + 0.08333333335 v = 1.293681225 + 0.08333333335 Combine like terms: 1.293681225 + 0.08333333335 = 1.37701455835 v = 1.37701455835 Simplifying v = 1.37701455835

Subproblem 2

v + -0.08333333335 = -1.293681225 Simplifying v + -0.08333333335 = -1.293681225 Reorder the terms: -0.08333333335 + v = -1.293681225 Solving -0.08333333335 + v = -1.293681225 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + v = -1.293681225 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + v = -1.293681225 + 0.08333333335 v = -1.293681225 + 0.08333333335 Combine like terms: -1.293681225 + 0.08333333335 = -1.21034789165 v = -1.21034789165 Simplifying v = -1.21034789165

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.37701455835, -1.21034789165}

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