Question 263171
Here is the original question:
(i) {{{((z^2-3z-4)/(z+3))* ((z-1)/(z-4))}}}
step 1 - factor all binomials if possible. we get
(ii) {{{((z-4)(z+1)/(z+3))*((z-1)/(z-4))}}}
step 2 - cancel the z-4 to get
(iii) {{{ (z^2-1)/(z+3)}}}