Question

8. If f(x) = x2 + x3, then f(−3) equals ________________.

Answer 1

$f( - 3) = - 3 \times 2 - 3 \times 3(given \\ \: in \: \: \: \: \: \: \: f = - 3 )\\ \\ = - 6 - 9 \\ \\ = - 15$