Which of the following is a polynomial with roots 4, –2, and 2i

Question

anonymous · Answer

the one that looks like $(x-4)(x+2)(x+2i)(x-2i)$

anonymous · Answer

that is ,  the one that looks like that stuff after you multiply out

anonymous · Answer

these are the possible answers
x3 – 4x2 + 4x – 16

 x3 + 4x2 + 4x + 16

 x3 + 2x2 + 4x + 8

 x3 – 2x2 + 4x – 8

anonymous · Answer

(x + 4)(x - 2i)(x + 2i)
= (x + 4)(x² + 4)
= x³ + 4x² + 4x + 16

anonymous · Answer

anonymous · Answer

oh thanks

anonymous · Answer

hold the phone

anonymous · Answer

@best.shakir its 4, -2, and 2i not -2i

anonymous · Answer

what about -2 as a zero??

anonymous · Answer

must be a typo in the question
solution should be a polynomial of degree 4, not 3

anonymous · Answer

so do u think the last one x3 – 2x2 + 4x – 8 wud be the answer

anonymous · Answer

never mind i have the answer