Question

Derivada de f(x) = (x-1).(x+1)

Answer 1

$f(x) = (x - 1)(x + 1) = {x}^{2} - 1$

Derivando, obtemos:

$2 {x}^{2 - 1} + 0 = 2x$

Logo, f'(x) = 2x.