48c^2+19c-21=0

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Solution for 48c^2+19c-21=0 equation:


Simplifying
48c2 + 19c + -21 = 0

Reorder the terms:
-21 + 19c + 48c2 = 0

Solving
-21 + 19c + 48c2 = 0

Solving for variable 'c'.

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

Divide each side by '48'.
-0.4375 + 0.3958333333c + c2 = 0

Move the constant term to the right:

Add '0.4375' to each side of the equation.
-0.4375 + 0.3958333333c + 0.4375 + c2 = 0 + 0.4375

Reorder the terms:
-0.4375 + 0.4375 + 0.3958333333c + c2 = 0 + 0.4375

Combine like terms: -0.4375 + 0.4375 = 0.0000
0.0000 + 0.3958333333c + c2 = 0 + 0.4375
0.3958333333c + c2 = 0 + 0.4375

Combine like terms: 0 + 0.4375 = 0.4375
0.3958333333c + c2 = 0.4375

The c term is 0.3958333333c.  Take half its coefficient (0.1979166667).
Square it (0.03917100696) and add it to both sides.

Add '0.03917100696' to each side of the equation.
0.3958333333c + 0.03917100696 + c2 = 0.4375 + 0.03917100696

Reorder the terms:
0.03917100696 + 0.3958333333c + c2 = 0.4375 + 0.03917100696

Combine like terms: 0.4375 + 0.03917100696 = 0.47667100696
0.03917100696 + 0.3958333333c + c2 = 0.47667100696

Factor a perfect square on the left side:
(c + 0.1979166667)(c + 0.1979166667) = 0.47667100696

Calculate the square root of the right side: 0.690413649

Break this problem into two subproblems by setting 
(c + 0.1979166667) equal to 0.690413649 and -0.690413649.

Subproblem 1

c + 0.1979166667 = 0.690413649 Simplifying c + 0.1979166667 = 0.690413649 Reorder the terms: 0.1979166667 + c = 0.690413649 Solving 0.1979166667 + c = 0.690413649 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.1979166667' to each side of the equation. 0.1979166667 + -0.1979166667 + c = 0.690413649 + -0.1979166667 Combine like terms: 0.1979166667 + -0.1979166667 = 0.0000000000 0.0000000000 + c = 0.690413649 + -0.1979166667 c = 0.690413649 + -0.1979166667 Combine like terms: 0.690413649 + -0.1979166667 = 0.4924969823 c = 0.4924969823 Simplifying c = 0.4924969823

Subproblem 2

c + 0.1979166667 = -0.690413649 Simplifying c + 0.1979166667 = -0.690413649 Reorder the terms: 0.1979166667 + c = -0.690413649 Solving 0.1979166667 + c = -0.690413649 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.1979166667' to each side of the equation. 0.1979166667 + -0.1979166667 + c = -0.690413649 + -0.1979166667 Combine like terms: 0.1979166667 + -0.1979166667 = 0.0000000000 0.0000000000 + c = -0.690413649 + -0.1979166667 c = -0.690413649 + -0.1979166667 Combine like terms: -0.690413649 + -0.1979166667 = -0.8883303157 c = -0.8883303157 Simplifying c = -0.8883303157

Solution

The solution to the problem is based on the solutions from the subproblems. c = {0.4924969823, -0.8883303157}

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