Math question please help ASAP

Suppose the polynomial R(x) = a_13^13+a_12x^12+...+a_1x+a_0 has real coefficients with a_13≠0. Suppose also that R(x) has the following zeros:

4,
6,
-i,
5-4i

Using this above info...

a. what is another zero of R(x)?

b. At most how many real zeros of R(x) are there?

c. At most how many imaginary zeros of R(x) are there?

ps I used _ as subscript


thanks so much

Re : Math question please help ASAP

Please help me what is x+7=1/2x+5

Re : Math question please help ASAP

Please answer me the question
Given
A=[a b c]abd B-(u p
V Q
W R

Re : Math question please help ASAP

No idea about two of those but think I can just about do this one:

x+7=1/2x+5

x = 1/2x - 2

1/2x = -2

x = -4

Re : Math question please help ASAP

In a sequence of positive integers, every time the first two terms is the sum of the previous terms in the sequence. if the fifth term is 2004. what is the maximum possible value of the first term

Re : what is 1/3 of 180ml

Maths question please help.

Re : Math question please help ASAP

1/3 of 180ml = 60ml.