Answer:
12a³+2a²+23a+18
Step-by-step explanation:
(3a+2)(4a²-2a+9)=
12a³-6a²+27a+8a²-4a+18=
12a³+2a²+23a+18
If you need more explanation, reply to this answer.
12 + 26 + 125 = 163
163 + 0.056(163) = 163 + 9.13 = 172.13
4, vertical, horizontal, and both diagonals