v^2=8v+2

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Solution for v^2=8v+2 equation:


Simplifying
v2 = 8v + 2

Reorder the terms:
v2 = 2 + 8v

Solving
v2 = 2 + 8v

Solving for variable 'v'.

Reorder the terms:
-2 + -8v + v2 = 2 + 8v + -2 + -8v

Reorder the terms:
-2 + -8v + v2 = 2 + -2 + 8v + -8v

Combine like terms: 2 + -2 = 0
-2 + -8v + v2 = 0 + 8v + -8v
-2 + -8v + v2 = 8v + -8v

Combine like terms: 8v + -8v = 0
-2 + -8v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -8v + 2 + v2 = 0 + 2

Reorder the terms:
-2 + 2 + -8v + v2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -8v + v2 = 0 + 2
-8v + v2 = 0 + 2

Combine like terms: 0 + 2 = 2
-8v + v2 = 2

The v term is -8v.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8v + 16 + v2 = 2 + 16

Reorder the terms:
16 + -8v + v2 = 2 + 16

Combine like terms: 2 + 16 = 18
16 + -8v + v2 = 18

Factor a perfect square on the left side:
(v + -4)(v + -4) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(v + -4) equal to 4.242640687 and -4.242640687.

Subproblem 1

v + -4 = 4.242640687 Simplifying v + -4 = 4.242640687 Reorder the terms: -4 + v = 4.242640687 Solving -4 + v = 4.242640687 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + v = 4.242640687 + 4 Combine like terms: -4 + 4 = 0 0 + v = 4.242640687 + 4 v = 4.242640687 + 4 Combine like terms: 4.242640687 + 4 = 8.242640687 v = 8.242640687 Simplifying v = 8.242640687

Subproblem 2

v + -4 = -4.242640687 Simplifying v + -4 = -4.242640687 Reorder the terms: -4 + v = -4.242640687 Solving -4 + v = -4.242640687 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + v = -4.242640687 + 4 Combine like terms: -4 + 4 = 0 0 + v = -4.242640687 + 4 v = -4.242640687 + 4 Combine like terms: -4.242640687 + 4 = -0.242640687 v = -0.242640687 Simplifying v = -0.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. v = {8.242640687, -0.242640687}

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