Answer :
(2n^2 + 5n + 3)(4n - 5) =
4n(2n^2 + 5n + 3) - 5(2n^2 + 5n + 3) =
8n^3 + 20n^2 + 12n - 10n^2 - 25n - 15 =
8n^3 + 10n^2 - 13n - 15 <===
4n(2n^2 + 5n + 3) - 5(2n^2 + 5n + 3) =
8n^3 + 20n^2 + 12n - 10n^2 - 25n - 15 =
8n^3 + 10n^2 - 13n - 15 <===