Answer:
[tex]25a^{2}[/tex]
Step-by-step explanation:
5 times a times 5 times a
you can do 5 times 5 first and get 25
then you can do a times a and that gets you [tex]a^{2}[/tex]
then you multiply these two together and you can get [tex]25a^{2}[/tex]