Question 1147054
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They want you apply the  Rational  Roots  theorem.



But I prefer to make a plot of the polynomial first and then to see its roots VISUALLY.



When you see them visually, it is &nbsp;<U>MUCH &nbsp;EASIER</U> &nbsp;to apply then the &nbsp;Rational &nbsp;Roots &nbsp;theorem


and to justify everything, pretending as if you &nbsp;"guessed"&nbsp; these roots &nbsp;<U>using yours &nbsp;6-th sense".