c^2+6c+1=0

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Solution for c^2+6c+1=0 equation:


Simplifying
c2 + 6c + 1 = 0

Reorder the terms:
1 + 6c + c2 = 0

Solving
1 + 6c + c2 = 0

Solving for variable 'c'.

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 6c + -1 + c2 = 0 + -1

Reorder the terms:
1 + -1 + 6c + c2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 6c + c2 = 0 + -1
6c + c2 = 0 + -1

Combine like terms: 0 + -1 = -1
6c + c2 = -1

The c term is 6c.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6c + 9 + c2 = -1 + 9

Reorder the terms:
9 + 6c + c2 = -1 + 9

Combine like terms: -1 + 9 = 8
9 + 6c + c2 = 8

Factor a perfect square on the left side:
(c + 3)(c + 3) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(c + 3) equal to 2.828427125 and -2.828427125.

Subproblem 1

c + 3 = 2.828427125 Simplifying c + 3 = 2.828427125 Reorder the terms: 3 + c = 2.828427125 Solving 3 + c = 2.828427125 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + c = 2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + c = 2.828427125 + -3 c = 2.828427125 + -3 Combine like terms: 2.828427125 + -3 = -0.171572875 c = -0.171572875 Simplifying c = -0.171572875

Subproblem 2

c + 3 = -2.828427125 Simplifying c + 3 = -2.828427125 Reorder the terms: 3 + c = -2.828427125 Solving 3 + c = -2.828427125 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + c = -2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + c = -2.828427125 + -3 c = -2.828427125 + -3 Combine like terms: -2.828427125 + -3 = -5.828427125 c = -5.828427125 Simplifying c = -5.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. c = {-0.171572875, -5.828427125}

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