Question

help please...find the complex zeros of the polynomial function.
use the complex zeros to write f in factored form
f(x)=x^4+9x^2+8

Answer 1

factor as
\[(x^2+1)(x^2+8)\] then set each factor equal to zero and solve

Answer 2

\[x^2+1=0\]
\[x^2=-1\]
\[x=\pm\sqrt{-1}=\pm\sqrt{i}\] for the first factor

Answer 3

just need to know if done correct f'(x)=18x+4x^3

Answer 4

hold on
it says "find the complex zeros" right, not "find the derivative"

Answer 5

ok i think i did it wrong this is so confusing

Answer 6

you just want the zeros right? this has nothing to do with calculus
factor as i factored above

Answer 7

the question is exact i think i just got lost