Answer:
[tex]p^4[/tex] or [tex]x^4[/tex] because you wrote [tex].... -10x^2+9[/tex] instead of p
Step-by-step explanation:
I'm going to assume (p2-9)(p2-1) is actually [tex](p^2-9)(p^2-1)[/tex]
so if I expand it then,
[tex]p^4-p^2-9p^2+9=p^4-10p^2+9[/tex]
So the missing part(blank)
is [tex]p^4[/tex] or is it [tex]x^4[/tex]