Question

plz solve it its urgnt

Answer 1

Pls note that I added -21 that's the remainder in the dividend . Hope that it helps

Answer 2

In the attachments I have answered this problem.

Remainder theorem:

The remainder when P(x) ìs divided by ( x-a) is P(a)

I have applied remainder theorem
to find the value of k.

I hope this answer helps you