2v^2+9v-7+10v^2=4v+10+v-8

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Solution for 2v^2+9v-7+10v^2=4v+10+v-8 equation:


Simplifying
2v2 + 9v + -7 + 10v2 = 4v + 10 + v + -8

Reorder the terms:
-7 + 9v + 2v2 + 10v2 = 4v + 10 + v + -8

Combine like terms: 2v2 + 10v2 = 12v2
-7 + 9v + 12v2 = 4v + 10 + v + -8

Reorder the terms:
-7 + 9v + 12v2 = 10 + -8 + 4v + v

Combine like terms: 10 + -8 = 2
-7 + 9v + 12v2 = 2 + 4v + v

Combine like terms: 4v + v = 5v
-7 + 9v + 12v2 = 2 + 5v

Solving
-7 + 9v + 12v2 = 2 + 5v

Solving for variable 'v'.

Reorder the terms:
-7 + -2 + 9v + -5v + 12v2 = 2 + 5v + -2 + -5v

Combine like terms: -7 + -2 = -9
-9 + 9v + -5v + 12v2 = 2 + 5v + -2 + -5v

Combine like terms: 9v + -5v = 4v
-9 + 4v + 12v2 = 2 + 5v + -2 + -5v

Reorder the terms:
-9 + 4v + 12v2 = 2 + -2 + 5v + -5v

Combine like terms: 2 + -2 = 0
-9 + 4v + 12v2 = 0 + 5v + -5v
-9 + 4v + 12v2 = 5v + -5v

Combine like terms: 5v + -5v = 0
-9 + 4v + 12v2 = 0

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

Divide each side by '12'.
-0.75 + 0.3333333333v + v2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 0.3333333333v + 0.75 + v2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 0.3333333333v + v2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 0.3333333333v + v2 = 0 + 0.75
0.3333333333v + v2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
0.3333333333v + v2 = 0.75

The v term is 0.3333333333v.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333v + 0.02777777779 + v2 = 0.75 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333v + v2 = 0.75 + 0.02777777779

Combine like terms: 0.75 + 0.02777777779 = 0.77777777779
0.02777777779 + 0.3333333333v + v2 = 0.77777777779

Factor a perfect square on the left side:
(v + 0.1666666667)(v + 0.1666666667) = 0.77777777779

Calculate the square root of the right side: 0.881917104

Break this problem into two subproblems by setting 
(v + 0.1666666667) equal to 0.881917104 and -0.881917104.

Subproblem 1

v + 0.1666666667 = 0.881917104 Simplifying v + 0.1666666667 = 0.881917104 Reorder the terms: 0.1666666667 + v = 0.881917104 Solving 0.1666666667 + v = 0.881917104 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + v = 0.881917104 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + v = 0.881917104 + -0.1666666667 v = 0.881917104 + -0.1666666667 Combine like terms: 0.881917104 + -0.1666666667 = 0.7152504373 v = 0.7152504373 Simplifying v = 0.7152504373

Subproblem 2

v + 0.1666666667 = -0.881917104 Simplifying v + 0.1666666667 = -0.881917104 Reorder the terms: 0.1666666667 + v = -0.881917104 Solving 0.1666666667 + v = -0.881917104 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + v = -0.881917104 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + v = -0.881917104 + -0.1666666667 v = -0.881917104 + -0.1666666667 Combine like terms: -0.881917104 + -0.1666666667 = -1.0485837707 v = -1.0485837707 Simplifying v = -1.0485837707

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.7152504373, -1.0485837707}

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