Which expression(s) below can best be factored by grouping?


There may be more than one correct answer. Be sure to select all that apply.


7x3 – 3x2 + 5x – 8

8x3 + 4x2 – 10x – 5

9x2 – 16

4x2 + 20x + 25

15x8 – 3x5 + 10x3 – 2