PLEASEEEEEE HELP!!
I WILL GIVE BRANLIEST TO CORRECT ANSWER

Answer:
A = 3x^2 - 2x - 1
Step-by-step explanation:
3x times x equals 3x^2
(3x times - 1) + (x times 1) = -2x
1 times -1 = -1
put the partial products together, you get the above answer.