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Can someone show me how to determine which of the following is a factor of th e polynomial x^-x-20?

Can someone show me how to determine which of the following is a factor of the polynomial x^-x-20?

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Arthur D. | Effective Mathematics TutorEffective Mathematics Tutor
5.0 5.0 (7 lesson ratings) (7)
1
assuming you mean x^2-x-20
x^2-x-20  factors to (x-5)(x+4)
Imtiazur S. | Tutor with master's degree and experience teaching CalculusTutor with master's degree and experienc...
4.9 4.9 (336 lesson ratings) (336)
0
Sandra,
Your question appears to have incomplete information.  Please copy the question completely.  I am assuming the question is multiple choice but the multiple choices are missing in your question.  Also x^ should have some number (or an expression) following the ^.  Please provide the question in its entirety.
 
Thanks
Imtiaz