Question

Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in standard form.

4, -8, and 2 + 5i

Answer 1

f(x) = x4 - 6x3 - 20x2 + 122x - 928

f(x) = x4 - 19x2 + 244x - 928

f(x) = x4 - 6x3 + 20x2 - 122x + 928

f(x) = x4 - 61x2 + 244x - 928

Answer 2

medals will be given btw plz help

Answer 3

because of the given roots, multiply out (x-4) (x+8 )(x-[2+5i]) (x-[2-5i]) to get the polynomial you need

Answer 4

so just use algebra to solve

Answer 5

thanks @dpaInc

Answer 6

ur welcome... sorry internet probs...