Answer: 10
Step-by-step explanation:
We know that in the binomial expansion of [tex](a+b)^n[/tex], the total number of terms = n+1
For the binomial expansion of [tex](3x + 5)^9[/tex] , n= 9
Then, the total number of terms in binomial expansion of [tex](3x + 5)^9[/tex] will be :-
[tex]n+1=9+1=10[/tex]
Hence, there are 10 terms are in the binomial expansion of [tex](3x +5)^9[/tex].
