(v+5)(v-3)=1

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Solution for (v+5)(v-3)=1 equation:


Simplifying
(v + 5)(v + -3) = 1

Reorder the terms:
(5 + v)(v + -3) = 1

Reorder the terms:
(5 + v)(-3 + v) = 1

Multiply (5 + v) * (-3 + v)
(5(-3 + v) + v(-3 + v)) = 1
((-3 * 5 + v * 5) + v(-3 + v)) = 1
((-15 + 5v) + v(-3 + v)) = 1
(-15 + 5v + (-3 * v + v * v)) = 1
(-15 + 5v + (-3v + v2)) = 1

Combine like terms: 5v + -3v = 2v
(-15 + 2v + v2) = 1

Solving
-15 + 2v + v2 = 1

Solving for variable 'v'.

Reorder the terms:
-15 + -1 + 2v + v2 = 1 + -1

Combine like terms: -15 + -1 = -16
-16 + 2v + v2 = 1 + -1

Combine like terms: 1 + -1 = 0
-16 + 2v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + 2v + 16 + v2 = 0 + 16

Reorder the terms:
-16 + 16 + 2v + v2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 2v + v2 = 0 + 16
2v + v2 = 0 + 16

Combine like terms: 0 + 16 = 16
2v + v2 = 16

The v term is 2v.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2v + 1 + v2 = 16 + 1

Reorder the terms:
1 + 2v + v2 = 16 + 1

Combine like terms: 16 + 1 = 17
1 + 2v + v2 = 17

Factor a perfect square on the left side:
(v + 1)(v + 1) = 17

Calculate the square root of the right side: 4.123105626

Break this problem into two subproblems by setting 
(v + 1) equal to 4.123105626 and -4.123105626.

Subproblem 1

v + 1 = 4.123105626 Simplifying v + 1 = 4.123105626 Reorder the terms: 1 + v = 4.123105626 Solving 1 + v = 4.123105626 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + v = 4.123105626 + -1 Combine like terms: 1 + -1 = 0 0 + v = 4.123105626 + -1 v = 4.123105626 + -1 Combine like terms: 4.123105626 + -1 = 3.123105626 v = 3.123105626 Simplifying v = 3.123105626

Subproblem 2

v + 1 = -4.123105626 Simplifying v + 1 = -4.123105626 Reorder the terms: 1 + v = -4.123105626 Solving 1 + v = -4.123105626 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + v = -4.123105626 + -1 Combine like terms: 1 + -1 = 0 0 + v = -4.123105626 + -1 v = -4.123105626 + -1 Combine like terms: -4.123105626 + -1 = -5.123105626 v = -5.123105626 Simplifying v = -5.123105626

Solution

The solution to the problem is based on the solutions from the subproblems. v = {3.123105626, -5.123105626}

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