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Dodger
(a + b)(a - 2b)
FOIL method F - first O - outside I - inside L - last (a + b)(a - 2b) First - multiply first terms in each set....a * a = a^2 Outside - multiply outside terms ....a * -2b = -2ab Inside - multiply inside terms ...b * a = ab Last - multiply last terms....b * -2b = -2b^2 Now put them together... a^2 - 2ab + ab - 2b^2 (combine like terms) a^2 - ab - 2b^2