Question

FOIL (x-2) (5x+3)

Answer 1

first - outside - inside- last

this is where the name comes from

Answer 2

I'll rewrite what Tajar had:
\[(a-b)(c+d)=ac+ad-bc-cd\]

Answer 3

last term is wrong it should be -bd not cd

Answer 4

1. FOIL (ax+b)(cx+d)= (ax x cx) + (ax x d) + (b x cx) + (b x d)

Answer 5

Looks easier if I write it as follows:

FOIL (ax+b)(cx+d)=

(ax x cx) + (ax x d) + (b x cx) + (b x d)

Answer 6

not the clearest way to write it @Tajar, but it may do the trick