Answer
All values must be included.
Work Step by Step
The given expression is
$=\frac{x^2}{x^2+1} $
(a) Substitute $x=3$.
$=\frac{3^2}{3^2+1} $
Simplify.
$=\frac{9}{9+1} $
$=\frac{9}{10} $
(b) Substitute $x=1$.
$=\frac{1^2}{1^2+1} $
Simplify.
$=\frac{1}{1+1} $
$=\frac{1}{2} $
(c) Substitute $x=0$.
$=\frac{0^2}{0^2+1} $
Simplify.
$=\frac{0}{0+1} $
$=\frac{0}{1} $
$=0 $
(d) Substitute $x=-1$.
$=\frac{(-1)^2}{(-1)^2+1} $
Simplify.
$=\frac{1}{1+1} $
$=\frac{1}{2} $
Hence, all values must be included.
