a)what is the number of complex roots b)possible number of real positive and real negative roots C) possible number of rational roots for the equation x^4+x^3-4x^2+2x-5=0

Question

number of complex roots includes real roots and imaginary roots

Answer 1

There are 4 roots total (Fundamental Theorem of Algebra)

There are possibly 3 positive real roots and 1 negative real root. (Descartes Rule of SIgns)

The possible rational roots are ±1 and ±5.