3k^2+8k=-5

Solution for 3k^2+8k=-5 equation:

Simplifying
3k2 + 8k = -5

Reorder the terms:
8k + 3k2 = -5

Solving
8k + 3k2 = -5

Solving for variable 'k'.

Reorder the terms:
5 + 8k + 3k2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 8k + 3k2 = 0

Factor a trinomial.
(5 + 3k)(1 + k) = 0

Subproblem 1
Set the factor '(5 + 3k)' equal to zero and attempt to solve:

Simplifying
5 + 3k = 0

Solving
5 + 3k = 0

Move all terms containing k to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + 3k = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3k = 0 + -5
3k = 0 + -5

Combine like terms: 0 + -5 = -5
3k = -5

Divide each side by '3'.
k = -1.666666667

Simplifying
k = -1.666666667
Subproblem 2
Set the factor '(1 + k)' equal to zero and attempt to solve:

Simplifying
1 + k = 0

Solving
1 + k = 0

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 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + k = 0 + -1
k = 0 + -1

Combine like terms: 0 + -1 = -1
k = -1

Simplifying
k = -1
Solution
k = {-1.666666667, -1}