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Mathematics 18 Online
OpenStudy (anonymous):

foil means?

OpenStudy (anonymous):

rainbow method!!!

sam (.sam.):

All you need to know http://en.wikipedia.org/wiki/FOIL_method

OpenStudy (agreene):

FOIL: First Outside Inside Last e.g: (a+b)(c+d) First Outside Inside Last ac + ad + bc + bd

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