Answer:
a,c,b
aStep-by-step explanation:
Should be letter C to question
Are there options? you said which of the following
Answer:

Step-by-step explanation:
=
(Group Like Trems) =
=

Answer:
A. (3x^2 + 1)(x + 3)
Step-by-step explanation:
3x3 + 9x2 + x + 3
I will factor by grouping
Factor out a 3x^2 from the first two terms
3x^2 (x+3) + (x+3)
Then factor out an x+3
(x+3)(3x^2+1)