Answer:
-48[tex]r^{2}[/tex] - 10r + 3
Step-by-step explanation:
FOIL method
First : (6r) · (- 8r) = - 48[tex]r^{2}[/tex]
Outer : (6r) · (-3) = -18r
Inner : (-1) · (-8r) = 8r
Last : (-1) · (-3) = +3
combine like terms
