This process can be a bit tricky:
(4v - 1)(5v - 3) ~ First, let's multiply 4v by 5v and -3.
20v^2 - 12v ~ Now take -1 from the top and multiply it by 5v and -3.
-5v + 3 ~ Now we add like terms.
20v^2 - 12v - 5v + 3 ~ Subtract -12v - 5v.
20v^2 - 7v + 3 ~ That is as simplified as you can get it.
Answer: 20v^2 - 7v + 3
I hope this helps, have a great rest of your day! ^ ^
{-Ghostgate-}