c^2+6c+8c=-3

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Solution for c^2+6c+8c=-3 equation:


Simplifying
c2 + 6c + 8c = -3

Reorder the terms:
6c + 8c + c2 = -3

Combine like terms: 6c + 8c = 14c
14c + c2 = -3

Solving
14c + c2 = -3

Solving for variable 'c'.

Reorder the terms:
3 + 14c + c2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + 14c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 14c + -3 + c2 = 0 + -3

Reorder the terms:
3 + -3 + 14c + c2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 14c + c2 = 0 + -3
14c + c2 = 0 + -3

Combine like terms: 0 + -3 = -3
14c + c2 = -3

The c term is 14c.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14c + 49 + c2 = -3 + 49

Reorder the terms:
49 + 14c + c2 = -3 + 49

Combine like terms: -3 + 49 = 46
49 + 14c + c2 = 46

Factor a perfect square on the left side:
(c + 7)(c + 7) = 46

Calculate the square root of the right side: 6.782329983

Break this problem into two subproblems by setting 
(c + 7) equal to 6.782329983 and -6.782329983.

Subproblem 1

c + 7 = 6.782329983 Simplifying c + 7 = 6.782329983 Reorder the terms: 7 + c = 6.782329983 Solving 7 + c = 6.782329983 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + c = 6.782329983 + -7 Combine like terms: 7 + -7 = 0 0 + c = 6.782329983 + -7 c = 6.782329983 + -7 Combine like terms: 6.782329983 + -7 = -0.217670017 c = -0.217670017 Simplifying c = -0.217670017

Subproblem 2

c + 7 = -6.782329983 Simplifying c + 7 = -6.782329983 Reorder the terms: 7 + c = -6.782329983 Solving 7 + c = -6.782329983 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + c = -6.782329983 + -7 Combine like terms: 7 + -7 = 0 0 + c = -6.782329983 + -7 c = -6.782329983 + -7 Combine like terms: -6.782329983 + -7 = -13.782329983 c = -13.782329983 Simplifying c = -13.782329983

Solution

The solution to the problem is based on the solutions from the subproblems. c = {-0.217670017, -13.782329983}

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