c^2+8c+3=0

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Solution for c^2+8c+3=0 equation:


Simplifying
c2 + 8c + 3 = 0

Reorder the terms:
3 + 8c + c2 = 0

Solving
3 + 8c + c2 = 0

Solving for variable 'c'.

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 8c + -3 + c2 = 0 + -3

Reorder the terms:
3 + -3 + 8c + c2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 8c + c2 = 0 + -3
8c + c2 = 0 + -3

Combine like terms: 0 + -3 = -3
8c + c2 = -3

The c term is 8c.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8c + 16 + c2 = -3 + 16

Reorder the terms:
16 + 8c + c2 = -3 + 16

Combine like terms: -3 + 16 = 13
16 + 8c + c2 = 13

Factor a perfect square on the left side:
(c + 4)(c + 4) = 13

Calculate the square root of the right side: 3.605551275

Break this problem into two subproblems by setting 
(c + 4) equal to 3.605551275 and -3.605551275.

Subproblem 1

c + 4 = 3.605551275 Simplifying c + 4 = 3.605551275 Reorder the terms: 4 + c = 3.605551275 Solving 4 + c = 3.605551275 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + c = 3.605551275 + -4 Combine like terms: 4 + -4 = 0 0 + c = 3.605551275 + -4 c = 3.605551275 + -4 Combine like terms: 3.605551275 + -4 = -0.394448725 c = -0.394448725 Simplifying c = -0.394448725

Subproblem 2

c + 4 = -3.605551275 Simplifying c + 4 = -3.605551275 Reorder the terms: 4 + c = -3.605551275 Solving 4 + c = -3.605551275 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + c = -3.605551275 + -4 Combine like terms: 4 + -4 = 0 0 + c = -3.605551275 + -4 c = -3.605551275 + -4 Combine like terms: -3.605551275 + -4 = -7.605551275 c = -7.605551275 Simplifying c = -7.605551275

Solution

The solution to the problem is based on the solutions from the subproblems. c = {-0.394448725, -7.605551275}

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