Respuesta :

Answer:

[tex]\boxed{\sf \ \ \ 15a^5b^{15} \ \ \ }[/tex]

Step-by-step explanation:

hello,

[tex](3a^2b^7) (5a^3b^8)=15a^{2+3}b^{7+8}=15a^5b^{15}[/tex]

hope this helps