(v+7)(v+7)=2v^2+16v+3v

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Solution for (v+7)(v+7)=2v^2+16v+3v equation:


Simplifying
(v + 7)(v + 7) = 2v2 + 16v + 3v

Reorder the terms:
(7 + v)(v + 7) = 2v2 + 16v + 3v

Reorder the terms:
(7 + v)(7 + v) = 2v2 + 16v + 3v

Multiply (7 + v) * (7 + v)
(7(7 + v) + v(7 + v)) = 2v2 + 16v + 3v
((7 * 7 + v * 7) + v(7 + v)) = 2v2 + 16v + 3v
((49 + 7v) + v(7 + v)) = 2v2 + 16v + 3v
(49 + 7v + (7 * v + v * v)) = 2v2 + 16v + 3v
(49 + 7v + (7v + v2)) = 2v2 + 16v + 3v

Combine like terms: 7v + 7v = 14v
(49 + 14v + v2) = 2v2 + 16v + 3v

Reorder the terms:
49 + 14v + v2 = 16v + 3v + 2v2

Combine like terms: 16v + 3v = 19v
49 + 14v + v2 = 19v + 2v2

Solving
49 + 14v + v2 = 19v + 2v2

Solving for variable 'v'.

Reorder the terms:
49 + 14v + -19v + v2 + -2v2 = 19v + 2v2 + -19v + -2v2

Combine like terms: 14v + -19v = -5v
49 + -5v + v2 + -2v2 = 19v + 2v2 + -19v + -2v2

Combine like terms: v2 + -2v2 = -1v2
49 + -5v + -1v2 = 19v + 2v2 + -19v + -2v2

Reorder the terms:
49 + -5v + -1v2 = 19v + -19v + 2v2 + -2v2

Combine like terms: 19v + -19v = 0
49 + -5v + -1v2 = 0 + 2v2 + -2v2
49 + -5v + -1v2 = 2v2 + -2v2

Combine like terms: 2v2 + -2v2 = 0
49 + -5v + -1v2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-49 + 5v + v2 = 0

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 5v + 49 + v2 = 0 + 49

Reorder the terms:
-49 + 49 + 5v + v2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 5v + v2 = 0 + 49
5v + v2 = 0 + 49

Combine like terms: 0 + 49 = 49
5v + v2 = 49

The v term is 5v.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5v + 6.25 + v2 = 49 + 6.25

Reorder the terms:
6.25 + 5v + v2 = 49 + 6.25

Combine like terms: 49 + 6.25 = 55.25
6.25 + 5v + v2 = 55.25

Factor a perfect square on the left side:
(v + 2.5)(v + 2.5) = 55.25

Calculate the square root of the right side: 7.433034374

Break this problem into two subproblems by setting 
(v + 2.5) equal to 7.433034374 and -7.433034374.

Subproblem 1

v + 2.5 = 7.433034374 Simplifying v + 2.5 = 7.433034374 Reorder the terms: 2.5 + v = 7.433034374 Solving 2.5 + v = 7.433034374 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + v = 7.433034374 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + v = 7.433034374 + -2.5 v = 7.433034374 + -2.5 Combine like terms: 7.433034374 + -2.5 = 4.933034374 v = 4.933034374 Simplifying v = 4.933034374

Subproblem 2

v + 2.5 = -7.433034374 Simplifying v + 2.5 = -7.433034374 Reorder the terms: 2.5 + v = -7.433034374 Solving 2.5 + v = -7.433034374 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + v = -7.433034374 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + v = -7.433034374 + -2.5 v = -7.433034374 + -2.5 Combine like terms: -7.433034374 + -2.5 = -9.933034374 v = -9.933034374 Simplifying v = -9.933034374

Solution

The solution to the problem is based on the solutions from the subproblems. v = {4.933034374, -9.933034374}

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