(v-7)(v-2)=2

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Solution for (v-7)(v-2)=2 equation:


Simplifying
(v + -7)(v + -2) = 2

Reorder the terms:
(-7 + v)(v + -2) = 2

Reorder the terms:
(-7 + v)(-2 + v) = 2

Multiply (-7 + v) * (-2 + v)
(-7(-2 + v) + v(-2 + v)) = 2
((-2 * -7 + v * -7) + v(-2 + v)) = 2
((14 + -7v) + v(-2 + v)) = 2
(14 + -7v + (-2 * v + v * v)) = 2
(14 + -7v + (-2v + v2)) = 2

Combine like terms: -7v + -2v = -9v
(14 + -9v + v2) = 2

Solving
14 + -9v + v2 = 2

Solving for variable 'v'.

Reorder the terms:
14 + -2 + -9v + v2 = 2 + -2

Combine like terms: 14 + -2 = 12
12 + -9v + v2 = 2 + -2

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

Begin completing the square.

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -9v + -12 + v2 = 0 + -12

Reorder the terms:
12 + -12 + -9v + v2 = 0 + -12

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

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

The v term is -9v.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9v + 20.25 + v2 = -12 + 20.25

Reorder the terms:
20.25 + -9v + v2 = -12 + 20.25

Combine like terms: -12 + 20.25 = 8.25
20.25 + -9v + v2 = 8.25

Factor a perfect square on the left side:
(v + -4.5)(v + -4.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(v + -4.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

v + -4.5 = 2.872281323 Simplifying v + -4.5 = 2.872281323 Reorder the terms: -4.5 + v = 2.872281323 Solving -4.5 + v = 2.872281323 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + v = 2.872281323 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = 2.872281323 + 4.5 v = 2.872281323 + 4.5 Combine like terms: 2.872281323 + 4.5 = 7.372281323 v = 7.372281323 Simplifying v = 7.372281323

Subproblem 2

v + -4.5 = -2.872281323 Simplifying v + -4.5 = -2.872281323 Reorder the terms: -4.5 + v = -2.872281323 Solving -4.5 + v = -2.872281323 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + v = -2.872281323 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + v = -2.872281323 + 4.5 v = -2.872281323 + 4.5 Combine like terms: -2.872281323 + 4.5 = 1.627718677 v = 1.627718677 Simplifying v = 1.627718677

Solution

The solution to the problem is based on the solutions from the subproblems. v = {7.372281323, 1.627718677}

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