Question

Using the given zero, find one other zero of f(x).

4 - 5i is a zero of f(x).= x4 - 8x3 + 42x2 - 8x + 41.

Answer 1

if \(a+bi\) is a zero, then so is its conjugate \(a-bi\)

Answer 2

i dont understand. how do i use that formula

Answer 3

what is the conjugate of \(4-5i\) ?

Answer 4

i dont know. i asked my teacher she says its in my book. but i wasnt able to locate it. (I was absent for the lesson)