61631=4c^2+1490c

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Solution for 61631=4c^2+1490c equation:


Simplifying
61631 = 4c2 + 1490c

Reorder the terms:
61631 = 1490c + 4c2

Solving
61631 = 1490c + 4c2

Solving for variable 'c'.

Reorder the terms:
61631 + -1490c + -4c2 = 1490c + -1490c + 4c2 + -4c2

Combine like terms: 1490c + -1490c = 0
61631 + -1490c + -4c2 = 0 + 4c2 + -4c2
61631 + -1490c + -4c2 = 4c2 + -4c2

Combine like terms: 4c2 + -4c2 = 0
61631 + -1490c + -4c2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-15407.75 + 372.5c + c2 = 0

Move the constant term to the right:

Add '15407.75' to each side of the equation.
-15407.75 + 372.5c + 15407.75 + c2 = 0 + 15407.75

Reorder the terms:
-15407.75 + 15407.75 + 372.5c + c2 = 0 + 15407.75

Combine like terms: -15407.75 + 15407.75 = 0.00
0.00 + 372.5c + c2 = 0 + 15407.75
372.5c + c2 = 0 + 15407.75

Combine like terms: 0 + 15407.75 = 15407.75
372.5c + c2 = 15407.75

The c term is 372.5c.  Take half its coefficient (186.25).
Square it (34689.0625) and add it to both sides.

Add '34689.0625' to each side of the equation.
372.5c + 34689.0625 + c2 = 15407.75 + 34689.0625

Reorder the terms:
34689.0625 + 372.5c + c2 = 15407.75 + 34689.0625

Combine like terms: 15407.75 + 34689.0625 = 50096.8125
34689.0625 + 372.5c + c2 = 50096.8125

Factor a perfect square on the left side:
(c + 186.25)(c + 186.25) = 50096.8125

Calculate the square root of the right side: 223.823172393

Break this problem into two subproblems by setting 
(c + 186.25) equal to 223.823172393 and -223.823172393.

Subproblem 1

c + 186.25 = 223.823172393 Simplifying c + 186.25 = 223.823172393 Reorder the terms: 186.25 + c = 223.823172393 Solving 186.25 + c = 223.823172393 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-186.25' to each side of the equation. 186.25 + -186.25 + c = 223.823172393 + -186.25 Combine like terms: 186.25 + -186.25 = 0.00 0.00 + c = 223.823172393 + -186.25 c = 223.823172393 + -186.25 Combine like terms: 223.823172393 + -186.25 = 37.573172393 c = 37.573172393 Simplifying c = 37.573172393

Subproblem 2

c + 186.25 = -223.823172393 Simplifying c + 186.25 = -223.823172393 Reorder the terms: 186.25 + c = -223.823172393 Solving 186.25 + c = -223.823172393 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-186.25' to each side of the equation. 186.25 + -186.25 + c = -223.823172393 + -186.25 Combine like terms: 186.25 + -186.25 = 0.00 0.00 + c = -223.823172393 + -186.25 c = -223.823172393 + -186.25 Combine like terms: -223.823172393 + -186.25 = -410.073172393 c = -410.073172393 Simplifying c = -410.073172393

Solution

The solution to the problem is based on the solutions from the subproblems. c = {37.573172393, -410.073172393}

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