Can you please add more information so i can answer the question helpful.
Not sure what the question is.. Can you be a little more specific? Hope I can help! :)
Answer:
the train track is straight
Step-by-step explanation:
i had that too
(a + 1)(a² + 2a + 1)
= a(a² + 2a + 1) + 1(a² + 2a + 1)
= a³ + 2a² + a + a² + 2a + 1
= a³ + 3a² + 3a + 1
Answer: b
