so i thought i knew about partial fractions, but apparently i don't. i have the answer to a partial fraction but i can't figure out how you get to that answer.
the value is $$ X(z) = Z*(Z+2)/(Z-1)^2 = 1 + 3z/(z-1)^2+1/(z-1) $$
Where does the "1" comes from? in the 1+ .......