The answer to this question is c=3
The chosen topic is not meant for use with this type of problem. Try the examples below.
[-1,9)u(2,10]
(−1,2)∪(−4,0)
(−1,29)∪(26,50)
x^2 - 7x + 15
_________________
(x+4)/ x^3 - 3x^2 - 13x + 78
- x^3 + 4x^2
----------------
- 7x^2 - 13x
- - 7x^2 - 28x
------------------
15x + 78
- 15x + 60
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18
remainder = 18