How do you foil #(10x – 11)(–14x + 9)#?

1 Answer
Apr 24, 2018

Answer:

#-140x^2+244x-99#

Explanation:

FOIL stands for Firsts, Outsides, Insides, Lasts, meaning we multiply the terms in the binomial in that order.

  • First terms: #10x*-14x=-140x^2#
  • Outside terms: #10x*9=90x#
  • Inside terms: #-11*-14x=154x#
  • Last terms: #-11*9=-99#

Thus we have

#-140x^2+90x-154x-99#

The middle will simplify to #244x# and we're left with:

#-140x^2+244x-99#

Hope this helps!