How do you factor #ab - 5a + 4b - 20?
1 Answer
May 14, 2015
Group
#color(red)((ab-5a))+color(blue)((4b-20))#
Extract factor from each group
#color(red)((a)(b-5)) +color(blue)((4)(b-5))#
Extract the
#(color(red)(a)+color(blue)(4))(b-5)#
