Number downloaded
= 4x^2 + 3x + 8 + 12x^2 - 8x + 17
= 16x^2 - 5x + 25 songs.
Subtract what she deleted:-
= 16x^2 - 5x + 25 - (2x^2 - x + 4)
= 16x^2 - 5x + 25 - 2x^2 + x - 4
= 14x^2 - 4x + 21 songs Answer (Option b)
