Question

write the polynomial function of minimum degree with real coeeficients whos real zeros include those listed write the polynomial in standard form
3, -1, and -1+2i

Answer 1

If there weren't any complex numbers it would be easy.
if the roots were a, b, c
then (x-a)(x-b)(x-c)

with a complex root,
you will end up with
\[(x-a)(x-b)(x^2+c)\]