I have no idea how to do this problem.

Question

Find the product:

z squared plus 7z-8 z sqaured-8z
------------------- X __________
z squared-64 z-1

Answer 1

I think I see something like

(z^2 + 7z - 8)/(z^2 - 64)* (x^2 - 8z)/(z-1)

if so, I see after it factors nicely .

=(z+8)(z-1)/((z-8)(z+8)) * z(z-8)/(z-1)
= z but z ≠ 1,±8

Answer 2

Oh yes I forgot to add the choices are... z or -z or z over z-1 or z over z+1