You can
put this solution on YOUR website! Very routine arithmetic
x+1 divisor would be for root being -1.
dividend
; because we need to account for all the missing degrees of x.
-1 | 4 0 -3 0 1 0 5
| -4 4 -1 1 -2 2
|______________________________________
4 -4 1 -1 2 -2 7
You interpret that!