Given the function;
[tex]f(x)=(x+3)^3\times(2x-1)\times(x+5)[/tex]The function when simplified becomes;
[tex]f(x)=2x^5+27x^4+130x^3+252x^2+108x-135[/tex]Note that the highest degree of a polynomial gives you the highest number of complex roots for the polynomial.
ANSWER:
Hence, since this is a 5th degree polynomial, it has 5 complex roots.