r^2+6r-59=0

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Solution for r^2+6r-59=0 equation:


Simplifying
r2 + 6r + -59 = 0

Reorder the terms:
-59 + 6r + r2 = 0

Solving
-59 + 6r + r2 = 0

Solving for variable 'r'.

Begin completing the square.

Move the constant term to the right:

Add '59' to each side of the equation.
-59 + 6r + 59 + r2 = 0 + 59

Reorder the terms:
-59 + 59 + 6r + r2 = 0 + 59

Combine like terms: -59 + 59 = 0
0 + 6r + r2 = 0 + 59
6r + r2 = 0 + 59

Combine like terms: 0 + 59 = 59
6r + r2 = 59

The r term is 6r.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6r + 9 + r2 = 59 + 9

Reorder the terms:
9 + 6r + r2 = 59 + 9

Combine like terms: 59 + 9 = 68
9 + 6r + r2 = 68

Factor a perfect square on the left side:
(r + 3)(r + 3) = 68

Calculate the square root of the right side: 8.246211251

Break this problem into two subproblems by setting 
(r + 3) equal to 8.246211251 and -8.246211251.

Subproblem 1

r + 3 = 8.246211251 Simplifying r + 3 = 8.246211251 Reorder the terms: 3 + r = 8.246211251 Solving 3 + r = 8.246211251 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + r = 8.246211251 + -3 Combine like terms: 3 + -3 = 0 0 + r = 8.246211251 + -3 r = 8.246211251 + -3 Combine like terms: 8.246211251 + -3 = 5.246211251 r = 5.246211251 Simplifying r = 5.246211251

Subproblem 2

r + 3 = -8.246211251 Simplifying r + 3 = -8.246211251 Reorder the terms: 3 + r = -8.246211251 Solving 3 + r = -8.246211251 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + r = -8.246211251 + -3 Combine like terms: 3 + -3 = 0 0 + r = -8.246211251 + -3 r = -8.246211251 + -3 Combine like terms: -8.246211251 + -3 = -11.246211251 r = -11.246211251 Simplifying r = -11.246211251

Solution

The solution to the problem is based on the solutions from the subproblems. r = {5.246211251, -11.246211251}

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