Simplify 3n(4n2 + 5n).

(1 point)
Responses

12n3 + 15n2
12 n 3 + 15 n 2

7n2 + 8n
7 n 2 + 8 n

12n2 + 15n
12 n 2 + 15 n

12n2 + 8n
12 n 2 + 8 n

x

The simplified form is 12n^3 + 15n^2.