3C^2+12C+11=0

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Solution for 3C^2+12C+11=0 equation:


Simplifying
3C2 + 12C + 11 = 0

Reorder the terms:
11 + 12C + 3C2 = 0

Solving
11 + 12C + 3C2 = 0

Solving for variable 'C'.

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

Divide each side by '3'.
3.666666667 + 4C + C2 = 0

Move the constant term to the right:

Add '-3.666666667' to each side of the equation.
3.666666667 + 4C + -3.666666667 + C2 = 0 + -3.666666667

Reorder the terms:
3.666666667 + -3.666666667 + 4C + C2 = 0 + -3.666666667

Combine like terms: 3.666666667 + -3.666666667 = 0.000000000
0.000000000 + 4C + C2 = 0 + -3.666666667
4C + C2 = 0 + -3.666666667

Combine like terms: 0 + -3.666666667 = -3.666666667
4C + C2 = -3.666666667

The C term is 4C.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4C + 4 + C2 = -3.666666667 + 4

Reorder the terms:
4 + 4C + C2 = -3.666666667 + 4

Combine like terms: -3.666666667 + 4 = 0.333333333
4 + 4C + C2 = 0.333333333

Factor a perfect square on the left side:
(C + 2)(C + 2) = 0.333333333

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(C + 2) equal to 0.577350269 and -0.577350269.

Subproblem 1

C + 2 = 0.577350269 Simplifying C + 2 = 0.577350269 Reorder the terms: 2 + C = 0.577350269 Solving 2 + C = 0.577350269 Solving for variable 'C'. Move all terms containing C to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + C = 0.577350269 + -2 Combine like terms: 2 + -2 = 0 0 + C = 0.577350269 + -2 C = 0.577350269 + -2 Combine like terms: 0.577350269 + -2 = -1.422649731 C = -1.422649731 Simplifying C = -1.422649731

Subproblem 2

C + 2 = -0.577350269 Simplifying C + 2 = -0.577350269 Reorder the terms: 2 + C = -0.577350269 Solving 2 + C = -0.577350269 Solving for variable 'C'. Move all terms containing C to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + C = -0.577350269 + -2 Combine like terms: 2 + -2 = 0 0 + C = -0.577350269 + -2 C = -0.577350269 + -2 Combine like terms: -0.577350269 + -2 = -2.577350269 C = -2.577350269 Simplifying C = -2.577350269

Solution

The solution to the problem is based on the solutions from the subproblems. C = {-1.422649731, -2.577350269}

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