5c^2-13c-48=0

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Solution for 5c^2-13c-48=0 equation:


Simplifying
5c2 + -13c + -48 = 0

Reorder the terms:
-48 + -13c + 5c2 = 0

Solving
-48 + -13c + 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'.
-9.6 + -2.6c + c2 = 0

Move the constant term to the right:

Add '9.6' to each side of the equation.
-9.6 + -2.6c + 9.6 + c2 = 0 + 9.6

Reorder the terms:
-9.6 + 9.6 + -2.6c + c2 = 0 + 9.6

Combine like terms: -9.6 + 9.6 = 0.0
0.0 + -2.6c + c2 = 0 + 9.6
-2.6c + c2 = 0 + 9.6

Combine like terms: 0 + 9.6 = 9.6
-2.6c + c2 = 9.6

The c term is -2.6c.  Take half its coefficient (-1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
-2.6c + 1.69 + c2 = 9.6 + 1.69

Reorder the terms:
1.69 + -2.6c + c2 = 9.6 + 1.69

Combine like terms: 9.6 + 1.69 = 11.29
1.69 + -2.6c + c2 = 11.29

Factor a perfect square on the left side:
(c + -1.3)(c + -1.3) = 11.29

Calculate the square root of the right side: 3.360059523

Break this problem into two subproblems by setting 
(c + -1.3) equal to 3.360059523 and -3.360059523.

Subproblem 1

c + -1.3 = 3.360059523 Simplifying c + -1.3 = 3.360059523 Reorder the terms: -1.3 + c = 3.360059523 Solving -1.3 + c = 3.360059523 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + c = 3.360059523 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + c = 3.360059523 + 1.3 c = 3.360059523 + 1.3 Combine like terms: 3.360059523 + 1.3 = 4.660059523 c = 4.660059523 Simplifying c = 4.660059523

Subproblem 2

c + -1.3 = -3.360059523 Simplifying c + -1.3 = -3.360059523 Reorder the terms: -1.3 + c = -3.360059523 Solving -1.3 + c = -3.360059523 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + c = -3.360059523 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + c = -3.360059523 + 1.3 c = -3.360059523 + 1.3 Combine like terms: -3.360059523 + 1.3 = -2.060059523 c = -2.060059523 Simplifying c = -2.060059523

Solution

The solution to the problem is based on the solutions from the subproblems. c = {4.660059523, -2.060059523}

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