Question

Find f(3) if
f(x)=x^3 + 2x^2-x-1

Answer 1

`\underline{ \boxed{f(3) = 41}}`

Explanation:

`if \to \: f(x)=x^3 + 2x^2-x-1 \\ then \: f(3) = {3}^(3) + 2( {3)}^(2) - 3 - 1 \\ f(3) = 27 + 18 - 4 \\ f(3) = 41`