c^2-12c=38

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Solution for c^2-12c=38 equation:


Simplifying
c2 + -12c = 38

Reorder the terms:
-12c + c2 = 38

Solving
-12c + c2 = 38

Solving for variable 'c'.

Reorder the terms:
-38 + -12c + c2 = 38 + -38

Combine like terms: 38 + -38 = 0
-38 + -12c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + -12c + 38 + c2 = 0 + 38

Reorder the terms:
-38 + 38 + -12c + c2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + -12c + c2 = 0 + 38
-12c + c2 = 0 + 38

Combine like terms: 0 + 38 = 38
-12c + c2 = 38

The c term is -12c.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12c + 36 + c2 = 38 + 36

Reorder the terms:
36 + -12c + c2 = 38 + 36

Combine like terms: 38 + 36 = 74
36 + -12c + c2 = 74

Factor a perfect square on the left side:
(c + -6)(c + -6) = 74

Calculate the square root of the right side: 8.602325267

Break this problem into two subproblems by setting 
(c + -6) equal to 8.602325267 and -8.602325267.

Subproblem 1

c + -6 = 8.602325267 Simplifying c + -6 = 8.602325267 Reorder the terms: -6 + c = 8.602325267 Solving -6 + c = 8.602325267 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + c = 8.602325267 + 6 Combine like terms: -6 + 6 = 0 0 + c = 8.602325267 + 6 c = 8.602325267 + 6 Combine like terms: 8.602325267 + 6 = 14.602325267 c = 14.602325267 Simplifying c = 14.602325267

Subproblem 2

c + -6 = -8.602325267 Simplifying c + -6 = -8.602325267 Reorder the terms: -6 + c = -8.602325267 Solving -6 + c = -8.602325267 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + c = -8.602325267 + 6 Combine like terms: -6 + 6 = 0 0 + c = -8.602325267 + 6 c = -8.602325267 + 6 Combine like terms: -8.602325267 + 6 = -2.602325267 c = -2.602325267 Simplifying c = -2.602325267

Solution

The solution to the problem is based on the solutions from the subproblems. c = {14.602325267, -2.602325267}

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