2v^2+16v+15=v^2+36

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Solution for 2v^2+16v+15=v^2+36 equation:


Simplifying
2v2 + 16v + 15 = v2 + 36

Reorder the terms:
15 + 16v + 2v2 = v2 + 36

Reorder the terms:
15 + 16v + 2v2 = 36 + v2

Solving
15 + 16v + 2v2 = 36 + v2

Solving for variable 'v'.

Reorder the terms:
15 + -36 + 16v + 2v2 + -1v2 = 36 + v2 + -36 + -1v2

Combine like terms: 15 + -36 = -21
-21 + 16v + 2v2 + -1v2 = 36 + v2 + -36 + -1v2

Combine like terms: 2v2 + -1v2 = 1v2
-21 + 16v + 1v2 = 36 + v2 + -36 + -1v2

Reorder the terms:
-21 + 16v + 1v2 = 36 + -36 + v2 + -1v2

Combine like terms: 36 + -36 = 0
-21 + 16v + 1v2 = 0 + v2 + -1v2
-21 + 16v + 1v2 = v2 + -1v2

Combine like terms: v2 + -1v2 = 0
-21 + 16v + 1v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '21' to each side of the equation.
-21 + 16v + 21 + v2 = 0 + 21

Reorder the terms:
-21 + 21 + 16v + v2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 16v + v2 = 0 + 21
16v + v2 = 0 + 21

Combine like terms: 0 + 21 = 21
16v + v2 = 21

The v term is 16v.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16v + 64 + v2 = 21 + 64

Reorder the terms:
64 + 16v + v2 = 21 + 64

Combine like terms: 21 + 64 = 85
64 + 16v + v2 = 85

Factor a perfect square on the left side:
(v + 8)(v + 8) = 85

Calculate the square root of the right side: 9.219544457

Break this problem into two subproblems by setting 
(v + 8) equal to 9.219544457 and -9.219544457.

Subproblem 1

v + 8 = 9.219544457 Simplifying v + 8 = 9.219544457 Reorder the terms: 8 + v = 9.219544457 Solving 8 + v = 9.219544457 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + v = 9.219544457 + -8 Combine like terms: 8 + -8 = 0 0 + v = 9.219544457 + -8 v = 9.219544457 + -8 Combine like terms: 9.219544457 + -8 = 1.219544457 v = 1.219544457 Simplifying v = 1.219544457

Subproblem 2

v + 8 = -9.219544457 Simplifying v + 8 = -9.219544457 Reorder the terms: 8 + v = -9.219544457 Solving 8 + v = -9.219544457 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + v = -9.219544457 + -8 Combine like terms: 8 + -8 = 0 0 + v = -9.219544457 + -8 v = -9.219544457 + -8 Combine like terms: -9.219544457 + -8 = -17.219544457 v = -17.219544457 Simplifying v = -17.219544457

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.219544457, -17.219544457}

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