Question

Dadas as funções reais f(x) = x² – 1 e g(x) = –x², encontre o valor de: f(–1) . g(–2).

Answer 1

$f( - 1) = {( - 1)}^{2} - 1 \\ f( - 1) = 1 - 1 \\ f( - 1) = 0$

$g( - 2) = - {( - 2)}^{2} \\ g( - 2) = - 4$

$f( - 1) .g( - 2) = 0.( - 4) \\ f( - 1) .g( - 2) = 0$