## College Algebra (6th Edition)

In FOIL method of binomial multiplication FOIL is an acronym. F = Multiply FIRST term of each binomial (F = FIRST) O = Multiply OUTER term of each binomial (O = OUTER) I = Multiply INNER term of each binomial (I = INNER) L = Multiply LAST term of each binomial (L = LAST) Explanation Let us consider two binomials (a + b) and (c + d) F = ac O = ad I = bc L = bd On addition of all terms (a + b) . (c + d)= ac + ad + bc + bd Take another Example-(2x+5)(5x+3) F = 10$x^{2}$ O = 6x I = 25x L = 15 (2x+5)(5x+3) = 10$x^{2}$ + 6x + 25x + 15 = 10$x^{2}$ + 31x + 15