Question

dada a função f(x) = 2x³ - 1, calcule f(-2)

Answer 1

$\Large\boxed{\begin{array}{l}\sf f(x)=2x^3-1\\\sf f(-2)=2\cdot(-2)^3-1\\\sf f(-2)=2\cdot(-8)-1\\\sf f(-2)=-16-1\\\sf f(-2)=-17\checkmark\end{array}}$