k^2+2k+-60=0

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Solution for k^2+2k+-60=0 equation:


Simplifying
k2 + 2k + -60 = 0

Reorder the terms:
-60 + 2k + k2 = 0

Solving
-60 + 2k + k2 = 0

Solving for variable 'k'.

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + 2k + 60 + k2 = 0 + 60

Reorder the terms:
-60 + 60 + 2k + k2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + 2k + k2 = 0 + 60
2k + k2 = 0 + 60

Combine like terms: 0 + 60 = 60
2k + k2 = 60

The k term is 2k.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2k + 1 + k2 = 60 + 1

Reorder the terms:
1 + 2k + k2 = 60 + 1

Combine like terms: 60 + 1 = 61
1 + 2k + k2 = 61

Factor a perfect square on the left side:
(k + 1)(k + 1) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(k + 1) equal to 7.810249676 and -7.810249676.

Subproblem 1

k + 1 = 7.810249676 Simplifying k + 1 = 7.810249676 Reorder the terms: 1 + k = 7.810249676 Solving 1 + k = 7.810249676 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = 7.810249676 + -1 Combine like terms: 1 + -1 = 0 0 + k = 7.810249676 + -1 k = 7.810249676 + -1 Combine like terms: 7.810249676 + -1 = 6.810249676 k = 6.810249676 Simplifying k = 6.810249676

Subproblem 2

k + 1 = -7.810249676 Simplifying k + 1 = -7.810249676 Reorder the terms: 1 + k = -7.810249676 Solving 1 + k = -7.810249676 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + k = -7.810249676 + -1 Combine like terms: 1 + -1 = 0 0 + k = -7.810249676 + -1 k = -7.810249676 + -1 Combine like terms: -7.810249676 + -1 = -8.810249676 k = -8.810249676 Simplifying k = -8.810249676

Solution

The solution to the problem is based on the solutions from the subproblems. k = {6.810249676, -8.810249676}

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