Answer:
4
Step-by-step explanation:
Since the coefficients must be real and one of the roots is 1-i, then there has to be another root which is 1+i so that the coefficients can be real. Summing up all of the roots, we see there are 4 roots that just be part of the equation: 3, 4, 1-i, and 1+i. Since it is asking for the least, it has to be 4. Since the number of roots is the degree, the least it can be is 4.
