Question 194679
FOIL  is  a  simplified  form  of  distribution,  used  only  on  2 term x 2 term  problems
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F  stands  for  First,   multiply  first  terms
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O  stands  for  outside.  multiply  outside  terms
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I  stands  for  inside,  multiply  inside  terms
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L  stands  for  Last,  multiply  last terms
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an  example  might  help
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(x+1) (x+2) = F= x*x = x^2
,,,,,,,,,,,,,,,,,,,,,,O= x*2=2x
,,,,,,,,,,,,,,,,,,,,,, I = x*1 = x
,,,,,,,,,,,,,,,,,,,,,,,L = 1*2 =2
putting  it  together,,,,,,,,,,,,x^2 +2x +x +2 = x^2 +3x +2
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This  takes  some  practice,  but  it  is  worth  practice,  we  use  this  all  the  time
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Keep  up  the  good  work