The degree of a polynomial is equal to the sum of the number of real roots and the number of imaginary (complex) roots.
In this case, the polynomial has:
- 2 real roots (the x-intercepts)
- 4 imaginary roots
Imaginary roots typically come in conjugate pairs; hence, 4 imaginary roots would mean there are 2 pairs of conjugates (2 + 2 = 4).
Now we can calculate the total degree of the polynomial:
- 2 real roots + 4 imaginary roots = 6
Thus, the degree of the polynomial must be 6.
So the correct response is 6.