solve for the unknown: 8k-k2=42 and tell me how you did it i have no ideal how

k =  4 + 5.10i ,  4 - 5.10i

Step-by-step explanation:

8k - k^2 = 42

k^2 - 8k + 42 = 0

Completing the square:-

(k - 4)^2 - 16 +42 = 0

(k - 4)^2 = -26

k- 4 = +/-sqrt26

k = 4 + sqrt26 or 4 - sqrt26

k =  4 + 5.10i ,  4 - 5.10i

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.