6c^2+7c=2

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Solution for 6c^2+7c=2 equation:


Simplifying
6c2 + 7c = 2

Reorder the terms:
7c + 6c2 = 2

Solving
7c + 6c2 = 2

Solving for variable 'c'.

Reorder the terms:
-2 + 7c + 6c2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 7c + 6c2 = 0

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

Divide each side by '6'.
-0.3333333333 + 1.166666667c + c2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 1.166666667c + 0.3333333333 + c2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 1.166666667c + c2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 1.166666667c + c2 = 0 + 0.3333333333
1.166666667c + c2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
1.166666667c + c2 = 0.3333333333

The c term is 1.166666667c.  Take half its coefficient (0.5833333335).
Square it (0.3402777780) and add it to both sides.

Add '0.3402777780' to each side of the equation.
1.166666667c + 0.3402777780 + c2 = 0.3333333333 + 0.3402777780

Reorder the terms:
0.3402777780 + 1.166666667c + c2 = 0.3333333333 + 0.3402777780

Combine like terms: 0.3333333333 + 0.3402777780 = 0.6736111113
0.3402777780 + 1.166666667c + c2 = 0.6736111113

Factor a perfect square on the left side:
(c + 0.5833333335)(c + 0.5833333335) = 0.6736111113

Calculate the square root of the right side: 0.82073815

Break this problem into two subproblems by setting 
(c + 0.5833333335) equal to 0.82073815 and -0.82073815.

Subproblem 1

c + 0.5833333335 = 0.82073815 Simplifying c + 0.5833333335 = 0.82073815 Reorder the terms: 0.5833333335 + c = 0.82073815 Solving 0.5833333335 + c = 0.82073815 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + c = 0.82073815 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + c = 0.82073815 + -0.5833333335 c = 0.82073815 + -0.5833333335 Combine like terms: 0.82073815 + -0.5833333335 = 0.2374048165 c = 0.2374048165 Simplifying c = 0.2374048165

Subproblem 2

c + 0.5833333335 = -0.82073815 Simplifying c + 0.5833333335 = -0.82073815 Reorder the terms: 0.5833333335 + c = -0.82073815 Solving 0.5833333335 + c = -0.82073815 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5833333335' to each side of the equation. 0.5833333335 + -0.5833333335 + c = -0.82073815 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + c = -0.82073815 + -0.5833333335 c = -0.82073815 + -0.5833333335 Combine like terms: -0.82073815 + -0.5833333335 = -1.4040714835 c = -1.4040714835 Simplifying c = -1.4040714835

Solution

The solution to the problem is based on the solutions from the subproblems. c = {0.2374048165, -1.4040714835}

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