5c^2-36c-24=0

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Solution for 5c^2-36c-24=0 equation:


Simplifying
5c2 + -36c + -24 = 0

Reorder the terms:
-24 + -36c + 5c2 = 0

Solving
-24 + -36c + 5c2 = 0

Solving for variable 'c'.

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

Divide each side by '5'.
-4.8 + -7.2c + c2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + -7.2c + 4.8 + c2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + -7.2c + c2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + -7.2c + c2 = 0 + 4.8
-7.2c + c2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
-7.2c + c2 = 4.8

The c term is -7.2c.  Take half its coefficient (-3.6).
Square it (12.96) and add it to both sides.

Add '12.96' to each side of the equation.
-7.2c + 12.96 + c2 = 4.8 + 12.96

Reorder the terms:
12.96 + -7.2c + c2 = 4.8 + 12.96

Combine like terms: 4.8 + 12.96 = 17.76
12.96 + -7.2c + c2 = 17.76

Factor a perfect square on the left side:
(c + -3.6)(c + -3.6) = 17.76

Calculate the square root of the right side: 4.214261501

Break this problem into two subproblems by setting 
(c + -3.6) equal to 4.214261501 and -4.214261501.

Subproblem 1

c + -3.6 = 4.214261501 Simplifying c + -3.6 = 4.214261501 Reorder the terms: -3.6 + c = 4.214261501 Solving -3.6 + c = 4.214261501 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '3.6' to each side of the equation. -3.6 + 3.6 + c = 4.214261501 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + c = 4.214261501 + 3.6 c = 4.214261501 + 3.6 Combine like terms: 4.214261501 + 3.6 = 7.814261501 c = 7.814261501 Simplifying c = 7.814261501

Subproblem 2

c + -3.6 = -4.214261501 Simplifying c + -3.6 = -4.214261501 Reorder the terms: -3.6 + c = -4.214261501 Solving -3.6 + c = -4.214261501 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '3.6' to each side of the equation. -3.6 + 3.6 + c = -4.214261501 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + c = -4.214261501 + 3.6 c = -4.214261501 + 3.6 Combine like terms: -4.214261501 + 3.6 = -0.614261501 c = -0.614261501 Simplifying c = -0.614261501

Solution

The solution to the problem is based on the solutions from the subproblems. c = {7.814261501, -0.614261501}

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