Question

Evaluate the function: f(x)=x2+2x, find f(−1)

Answer 1

Answer:

$f( - 1) = - 1$

Step-by-step explanation:

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

Substitute x = -1 in the equation.

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