How many complex roots exist for the polynomial in this equation f(x)=x3+4x2-16 a. 1 real root and 2 complex roots b. 2 real and 1 complex root c. 0 real roots and 3 complex roots d. 3 real roots and 0 complex roots

  A.  1 real root and 2 complex roots

Step-by-step explanation:

The one sign change among the coefficients tells you there is one positive real root. The rule of signs is inconclusive regarding the number of negative real roots. A graph shows there are none, so there are ...

  1 real root and 2 complex roots

i think asking google will you get the answer to that question