Respuesta :

[tex]\bf \begin{cases} x=-1\implies &x+1=0\\ x=3\implies &x-3=0 \end{cases}\implies \stackrel{\textit{common factor}}{1}(x+1)(x-3)=y \\\\\\ 1(x^2-2x-3)=y\implies x^2-2x-3=y[/tex]

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