Question

how do you get 2i to equal zero? i'm writing a polynomial function, and 2i is one of the given zeros.

Answer 1

So specifically you want your polynomial to be zero when you plug in x=2i is that correct? Then all you have to do is take it, and change it:

\[x=2i\]
subtract 2i from both sides,
\[x-2i=0\]
You could multiply other things by this if you want, but now you can see that:

\[f(x)=x-2i\]

so now you have:

\[f(2i)=0\]