Use the FOIL method to simplify:
[tex](5r - 4)(r^2 - 6r + 4)[/tex]
--> [tex](5r)(r^2) + (5r)(-6r) + (5r)(4) + (-4)(r^2) + (-4)(6r) + (-4)(4)[/tex]
---> [tex]5r^3 - 30r^2 + 20r - 4r + 24r - 16[/tex]
COmbine like terms----> [tex]5r^3 - 34r^2 + 44r - 16[/tex]
