Respuesta :

[tex]f(x)=x^2-x[/tex]

to find f(-3) you just replace x=-3 on the equation

[tex]\begin{gathered} f(-3)=(-3)^2-(-3) \\ f(-3)=9+3 \\ f(-3)=12 \end{gathered}[/tex]

so, the option is D

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