(3r-13)(r+14)=-44

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Solution for (3r-13)(r+14)=-44 equation:


Simplifying
(3r + -13)(r + 14) = -44

Reorder the terms:
(-13 + 3r)(r + 14) = -44

Reorder the terms:
(-13 + 3r)(14 + r) = -44

Multiply (-13 + 3r) * (14 + r)
(-13(14 + r) + 3r * (14 + r)) = -44
((14 * -13 + r * -13) + 3r * (14 + r)) = -44
((-182 + -13r) + 3r * (14 + r)) = -44
(-182 + -13r + (14 * 3r + r * 3r)) = -44
(-182 + -13r + (42r + 3r2)) = -44

Combine like terms: -13r + 42r = 29r
(-182 + 29r + 3r2) = -44

Solving
-182 + 29r + 3r2 = -44

Solving for variable 'r'.

Reorder the terms:
-182 + 44 + 29r + 3r2 = -44 + 44

Combine like terms: -182 + 44 = -138
-138 + 29r + 3r2 = -44 + 44

Combine like terms: -44 + 44 = 0
-138 + 29r + 3r2 = 0

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

Divide each side by '3'.
-46 + 9.666666667r + r2 = 0

Move the constant term to the right:

Add '46' to each side of the equation.
-46 + 9.666666667r + 46 + r2 = 0 + 46

Reorder the terms:
-46 + 46 + 9.666666667r + r2 = 0 + 46

Combine like terms: -46 + 46 = 0
0 + 9.666666667r + r2 = 0 + 46
9.666666667r + r2 = 0 + 46

Combine like terms: 0 + 46 = 46
9.666666667r + r2 = 46

The r term is 9.666666667r.  Take half its coefficient (4.833333334).
Square it (23.36111112) and add it to both sides.

Add '23.36111112' to each side of the equation.
9.666666667r + 23.36111112 + r2 = 46 + 23.36111112

Reorder the terms:
23.36111112 + 9.666666667r + r2 = 46 + 23.36111112

Combine like terms: 46 + 23.36111112 = 69.36111112
23.36111112 + 9.666666667r + r2 = 69.36111112

Factor a perfect square on the left side:
(r + 4.833333334)(r + 4.833333334) = 69.36111112

Calculate the square root of the right side: 8.328331833

Break this problem into two subproblems by setting 
(r + 4.833333334) equal to 8.328331833 and -8.328331833.

Subproblem 1

r + 4.833333334 = 8.328331833 Simplifying r + 4.833333334 = 8.328331833 Reorder the terms: 4.833333334 + r = 8.328331833 Solving 4.833333334 + r = 8.328331833 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + r = 8.328331833 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + r = 8.328331833 + -4.833333334 r = 8.328331833 + -4.833333334 Combine like terms: 8.328331833 + -4.833333334 = 3.494998499 r = 3.494998499 Simplifying r = 3.494998499

Subproblem 2

r + 4.833333334 = -8.328331833 Simplifying r + 4.833333334 = -8.328331833 Reorder the terms: 4.833333334 + r = -8.328331833 Solving 4.833333334 + r = -8.328331833 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4.833333334' to each side of the equation. 4.833333334 + -4.833333334 + r = -8.328331833 + -4.833333334 Combine like terms: 4.833333334 + -4.833333334 = 0.000000000 0.000000000 + r = -8.328331833 + -4.833333334 r = -8.328331833 + -4.833333334 Combine like terms: -8.328331833 + -4.833333334 = -13.161665167 r = -13.161665167 Simplifying r = -13.161665167

Solution

The solution to the problem is based on the solutions from the subproblems. r = {3.494998499, -13.161665167}

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