Question

Fatorando o polinômio 16 b^2 – 9c^2 encontra-se:
10 pontos
(8b – 3c). (8b + 3c)
(4b – 4c).(4b + 4c)
(4b^2 - 3c).(4b^2 + 3c)
(4b – 3c).(4b + 3c)
(16 b – 3c). (16b + 3c)​

Answer 1

a^2 - k^2 = (a +k)(a - k)
a = 4b
K =3c
logo: 16b^2 - 9c^2 = (4b - 3c).(4b + 3c)