(v+6)(v+6)=20

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Solution for (v+6)(v+6)=20 equation:


Simplifying
(v + 6)(v + 6) = 20

Reorder the terms:
(6 + v)(v + 6) = 20

Reorder the terms:
(6 + v)(6 + v) = 20

Multiply (6 + v) * (6 + v)
(6(6 + v) + v(6 + v)) = 20
((6 * 6 + v * 6) + v(6 + v)) = 20
((36 + 6v) + v(6 + v)) = 20
(36 + 6v + (6 * v + v * v)) = 20
(36 + 6v + (6v + v2)) = 20

Combine like terms: 6v + 6v = 12v
(36 + 12v + v2) = 20

Solving
36 + 12v + v2 = 20

Solving for variable 'v'.

Reorder the terms:
36 + -20 + 12v + v2 = 20 + -20

Combine like terms: 36 + -20 = 16
16 + 12v + v2 = 20 + -20

Combine like terms: 20 + -20 = 0
16 + 12v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + 12v + -16 + v2 = 0 + -16

Reorder the terms:
16 + -16 + 12v + v2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 12v + v2 = 0 + -16
12v + v2 = 0 + -16

Combine like terms: 0 + -16 = -16
12v + v2 = -16

The v term is 12v.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12v + 36 + v2 = -16 + 36

Reorder the terms:
36 + 12v + v2 = -16 + 36

Combine like terms: -16 + 36 = 20
36 + 12v + v2 = 20

Factor a perfect square on the left side:
(v + 6)(v + 6) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(v + 6) equal to 4.472135955 and -4.472135955.

Subproblem 1

v + 6 = 4.472135955 Simplifying v + 6 = 4.472135955 Reorder the terms: 6 + v = 4.472135955 Solving 6 + v = 4.472135955 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + v = 4.472135955 + -6 Combine like terms: 6 + -6 = 0 0 + v = 4.472135955 + -6 v = 4.472135955 + -6 Combine like terms: 4.472135955 + -6 = -1.527864045 v = -1.527864045 Simplifying v = -1.527864045

Subproblem 2

v + 6 = -4.472135955 Simplifying v + 6 = -4.472135955 Reorder the terms: 6 + v = -4.472135955 Solving 6 + v = -4.472135955 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + v = -4.472135955 + -6 Combine like terms: 6 + -6 = 0 0 + v = -4.472135955 + -6 v = -4.472135955 + -6 Combine like terms: -4.472135955 + -6 = -10.472135955 v = -10.472135955 Simplifying v = -10.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. v = {-1.527864045, -10.472135955}

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