Respuesta :

Solution

At the point where f(x)=0 , the graph crosses the x-axis .

All points where f(x)=0 denotes the points where the graph intersects the x-axis. This points includes

[tex]\begin{gathered} x=1 \\ x=-1 \\ x=-3 \end{gathered}[/tex]

Hence the right choice is OPTION C

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