Help me? Could you please check my answers and tell me if i am wrong or right

4. A polynomial has one root that equals 4 + 17i. Name one other root of this polynomial.

What the... I have been looking at this prob forever, how in hell am i supposed to solve this...



5. If a polynomial has one root in the form a + sqrt(b) , it has a second root in the form of a_____sqrt(b) .

I am not sure if my answer is correct. Would I put a negative in that blank?



6. The value 3 is an upper bound for the zeros of the function shown below.

f(x)= -3x^3+20x^2-36x+16

True<----- I think it is this one... because. when I plug in 3, i get 7. positive number.

False

7. The value -1 is a lower bound for the zeros of the function shown below.


(Points : 2)
True <---- I think it is this one. because when I plug in -1, i get 16.

False

4. The complex conjugate root theorem states that if a+bi is a root (for real numbers a and b), then a-bi is also a root. In this case, it would be 4 - 17i.

5. yes, it would be a - sqrt(b)

complex roots come in pairs, other root is just conjugate: 4-17i