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f(x)= x^3+2x^2-13x+10/x^2-1 Show that the line x= -1 is a vertical asymptote of f, but x=1...

f(x)= x^3+2x^2-13x+10/x^2-1

Show that the line x= -1 is a vertical asymptote of f, but x=1 is not a vertical asymptote of f

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