Question

Plzz Help Me Questions No 2 i and I plzz ​

Answer 1

Answer:

i) k = -6

Step-by-step explanation:

12 = 2(1)^3 + 5(1)^2 - k(1) - 1      (Substitute 1 for x & set equal to 12)

12 = 2 + 5 - k - 1      (Clean)

12 = 6 - k      (Add and substract numbers on the right side)

6 = -k      (Subtract)

k = -6      (Divide by -1)