Question

Calcule os produtos notáveis abaixo:
(a) (x + 3) (x - 3) =
(b) (x - 7 ) (x + 7) =
(c) (3 + 1) (x - 1) =
(d) (x - 2) (x + 2) =​

Answer 1

(a) (x + 3) (x - 3) = x²-3x+3x-9 = x²-9

(b) (x - 7 ) (x + 7) = x²+7x-7x-49 = x²-49

(c) (x + 1) (x - 1) = x²-1x+1x-1 = x²-1

(d) (x - 2) (x + 2) = x²-2x+2x-4 = x²-4

Boa noite ❤️❤️❤️

24/09