(9v^2+3v-5)+(5v^2-3v)-(9v^2+4v-1)=

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Solution for (9v^2+3v-5)+(5v^2-3v)-(9v^2+4v-1)= equation:


Simplifying
(9v2 + 3v + -5) + (5v2 + -3v) + -1(9v2 + 4v + -1) = 0

Reorder the terms:
(-5 + 3v + 9v2) + (5v2 + -3v) + -1(9v2 + 4v + -1) = 0

Remove parenthesis around (-5 + 3v + 9v2)
-5 + 3v + 9v2 + (5v2 + -3v) + -1(9v2 + 4v + -1) = 0

Reorder the terms:
-5 + 3v + 9v2 + (-3v + 5v2) + -1(9v2 + 4v + -1) = 0

Remove parenthesis around (-3v + 5v2)
-5 + 3v + 9v2 + -3v + 5v2 + -1(9v2 + 4v + -1) = 0

Reorder the terms:
-5 + 3v + 9v2 + -3v + 5v2 + -1(-1 + 4v + 9v2) = 0
-5 + 3v + 9v2 + -3v + 5v2 + (-1 * -1 + 4v * -1 + 9v2 * -1) = 0
-5 + 3v + 9v2 + -3v + 5v2 + (1 + -4v + -9v2) = 0

Reorder the terms:
-5 + 1 + 3v + -3v + -4v + 9v2 + 5v2 + -9v2 = 0

Combine like terms: -5 + 1 = -4
-4 + 3v + -3v + -4v + 9v2 + 5v2 + -9v2 = 0

Combine like terms: 3v + -3v = 0
-4 + 0 + -4v + 9v2 + 5v2 + -9v2 = 0
-4 + -4v + 9v2 + 5v2 + -9v2 = 0

Combine like terms: 9v2 + 5v2 = 14v2
-4 + -4v + 14v2 + -9v2 = 0

Combine like terms: 14v2 + -9v2 = 5v2
-4 + -4v + 5v2 = 0

Solving
-4 + -4v + 5v2 = 0

Solving for variable 'v'.

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

Divide each side by '5'.
-0.8 + -0.8v + v2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -0.8v + 0.8 + v2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -0.8v + v2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -0.8v + v2 = 0 + 0.8
-0.8v + v2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-0.8v + v2 = 0.8

The v term is -0.8v.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8v + 0.16 + v2 = 0.8 + 0.16

Reorder the terms:
0.16 + -0.8v + v2 = 0.8 + 0.16

Combine like terms: 0.8 + 0.16 = 0.96
0.16 + -0.8v + v2 = 0.96

Factor a perfect square on the left side:
(v + -0.4)(v + -0.4) = 0.96

Calculate the square root of the right side: 0.979795897

Break this problem into two subproblems by setting 
(v + -0.4) equal to 0.979795897 and -0.979795897.

Subproblem 1

v + -0.4 = 0.979795897 Simplifying v + -0.4 = 0.979795897 Reorder the terms: -0.4 + v = 0.979795897 Solving -0.4 + v = 0.979795897 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + v = 0.979795897 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + v = 0.979795897 + 0.4 v = 0.979795897 + 0.4 Combine like terms: 0.979795897 + 0.4 = 1.379795897 v = 1.379795897 Simplifying v = 1.379795897

Subproblem 2

v + -0.4 = -0.979795897 Simplifying v + -0.4 = -0.979795897 Reorder the terms: -0.4 + v = -0.979795897 Solving -0.4 + v = -0.979795897 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + v = -0.979795897 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + v = -0.979795897 + 0.4 v = -0.979795897 + 0.4 Combine like terms: -0.979795897 + 0.4 = -0.579795897 v = -0.579795897 Simplifying v = -0.579795897

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.379795897, -0.579795897}

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