2010.6048=6.28r^2+6.28*r*36.5

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Solution for 2010.6048=6.28r^2+6.28*r*36.5 equation:


Simplifying
2010.6048 = 6.28r2 + 6.28r * 36.5

Reorder the terms for easier multiplication:
2010.6048 = 6.28r2 + 6.28 * 36.5r

Multiply 6.28 * 36.5
2010.6048 = 6.28r2 + 229.22r

Reorder the terms:
2010.6048 = 229.22r + 6.28r2

Solving
2010.6048 = 229.22r + 6.28r2

Solving for variable 'r'.

Reorder the terms:
2010.6048 + -229.22r + -6.28r2 = 229.22r + -229.22r + 6.28r2 + -6.28r2

Combine like terms: 229.22r + -229.22r = 0.00
2010.6048 + -229.22r + -6.28r2 = 0.00 + 6.28r2 + -6.28r2
2010.6048 + -229.22r + -6.28r2 = 6.28r2 + -6.28r2

Combine like terms: 6.28r2 + -6.28r2 = 0.00
2010.6048 + -229.22r + -6.28r2 = 0.00

Begin completing the square.  Divide all terms by
-6.28 the coefficient of the squared term: 

Divide each side by '-6.28'.
-320.16 + 36.5r + r2 = 0

Move the constant term to the right:

Add '320.16' to each side of the equation.
-320.16 + 36.5r + 320.16 + r2 = 0 + 320.16

Reorder the terms:
-320.16 + 320.16 + 36.5r + r2 = 0 + 320.16

Combine like terms: -320.16 + 320.16 = 0.00
0.00 + 36.5r + r2 = 0 + 320.16
36.5r + r2 = 0 + 320.16

Combine like terms: 0 + 320.16 = 320.16
36.5r + r2 = 320.16

The r term is 36.5r.  Take half its coefficient (18.25).
Square it (333.0625) and add it to both sides.

Add '333.0625' to each side of the equation.
36.5r + 333.0625 + r2 = 320.16 + 333.0625

Reorder the terms:
333.0625 + 36.5r + r2 = 320.16 + 333.0625

Combine like terms: 320.16 + 333.0625 = 653.2225
333.0625 + 36.5r + r2 = 653.2225

Factor a perfect square on the left side:
(r + 18.25)(r + 18.25) = 653.2225

Calculate the square root of the right side: 25.558217856

Break this problem into two subproblems by setting 
(r + 18.25) equal to 25.558217856 and -25.558217856.

Subproblem 1

r + 18.25 = 25.558217856 Simplifying r + 18.25 = 25.558217856 Reorder the terms: 18.25 + r = 25.558217856 Solving 18.25 + r = 25.558217856 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-18.25' to each side of the equation. 18.25 + -18.25 + r = 25.558217856 + -18.25 Combine like terms: 18.25 + -18.25 = 0.00 0.00 + r = 25.558217856 + -18.25 r = 25.558217856 + -18.25 Combine like terms: 25.558217856 + -18.25 = 7.308217856 r = 7.308217856 Simplifying r = 7.308217856

Subproblem 2

r + 18.25 = -25.558217856 Simplifying r + 18.25 = -25.558217856 Reorder the terms: 18.25 + r = -25.558217856 Solving 18.25 + r = -25.558217856 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-18.25' to each side of the equation. 18.25 + -18.25 + r = -25.558217856 + -18.25 Combine like terms: 18.25 + -18.25 = 0.00 0.00 + r = -25.558217856 + -18.25 r = -25.558217856 + -18.25 Combine like terms: -25.558217856 + -18.25 = -43.808217856 r = -43.808217856 Simplifying r = -43.808217856

Solution

The solution to the problem is based on the solutions from the subproblems. r = {7.308217856, -43.808217856}

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