Answer:
A. 27
Step-by-step explanation:
21 x 3 = 63
9 x 3 = 27
Answer:
kool
Step-by-step explanation:
The anwser is D and I’m sure of it
If
then complex number
is a root of cubic polynomial.
If polynomial has real coefficients, then conjugated
is also a root of polynomial.
Then the polynomial will be of a form

Since
then

Therefore,
