## anonymous 5 years ago z^2-81/7z+28 * z+4/z-9 multiply & simplify someone plz help

1. anonymous

I just solved it in your earlier post.

2. anonymous

$\[{z^2-81 \over 7z+28}.{z+8 \over z-9}={(z+9)(z-9) \over 7(z+8)}.{z+8 \over z-9}={z+9 \over 7}$\]

3. anonymous

thanks but its too late now the test is over

4. anonymous

Oh I am sorry for that.