Question

-Resolva: (a – 1) (a + 1) + 3(a – 1)(a – 1) + 3(a -1) + 1). ​

Answer 1

Resposta:

(a^2 + a - a - 1) + 3(a^2 - 1) + 3a +2

a^2 -1 + 3 a^2 - 3 + 3a +2

4a^2 + 3a -2