Answer:
Plese read the complete procedure below:
Step-by-step explanation:
The polynomial is p(a) = (a^4 - 6a^3 + 3a^2 + 26a – 24)
a)
1 Â -6 Â 3 Â 26 Â -24 Â Â | Â 1 Â Â
   1  -5  -2   24
1 Â -5 Â -2 Â 24 Â Â 0
The remainder is zero, then (a-1) is a factor of the polynomial
b)
1 Â -6 Â 3 Â 26 Â -24 Â Â | Â 2 Â Â
   2  -8  10   72
1 Â -4 Â 5 Â 36 Â Â 48
When p(a) is divided by (a-2) the remainder 28/p(a)
1 Â -6 Â 3 Â 26 Â -24 Â Â | -Â 4 Â Â
  -4  40  172  -792
1 Â -10 Â 43 Â 198 Â -816
When p(a) is divided by (a-2) the remainder -816/p(a)
c) I attached an image of the long division below: