Factor completely.
Please help. I don't know how to do factoring. Show work please. Thank you!
4r^3 - 8r^2 -5r + 10
Factor by grouping
4r^2 (r - 2) - 5(r - 2) take out the common factor (r - 2) and write back the rest
(r - 2) ( 4r^2 - 5)
