Answer:
Option (1) [tex]4p+9[/tex]
Step-by-step explanation:
Commutative property of addition states that while adding two real numbers m and n, the order of adding doesn't matter, i.e. we can add, m and n as [tex]m+n[/tex] as well as [tex]n+m[/tex].
So, we can conclude that the commutative property of addition states that there will be no impact of ordering the terms.
Now, we have [tex]9+4p[/tex]
So, by the commutative property of addition we can say that [tex]4p+9[/tex] is same as [tex]9+4p[/tex].
Hence, the expression shown in option (1) is correct.
