Given the initial expression
[tex]5-9-5p[/tex]Notice that p^0=1; thus,
[tex]5-9-5p=5p^0-9p^0-5p[/tex]Combining terms that are multiplied by p^0,
[tex]\begin{gathered} \Rightarrow5-9-5p=(5-9)p^0-5p \\ =(-4)p^0-5p \\ =-4-5p \end{gathered}[/tex]The answer is -4-5p
