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The rational zero theorem says that if the zeros of the polynomial `f(x)` are rational, then numerators are positive or negative factors of the constant term -1, and the denominators are positive factors of the leading coefficient 11.
This means we can look at any of the possible roots:
`+-1` , `+-1/11`
Starting with `x=1/11` , we see that
`f(1)=1/121-1/121+1-1=0` so `x-11` is a factor.
With factoring, we see then that
So the only real root is `x=1/11` .
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