Answer: 2a^3-a^2+2a-3
Step-by-step explanation:
(2a^2+a+3) (a-1)
2a^3-2a^2+a^2-a+3a-3
2a^3-a^2+2a-3
Note: If you need extra help with this topic, I suggest you should search up "how to multiply a trinomial by a binomial" on Google. It will help you a lot!