



 
Hi Krys, You need two facts to solve this problem. First if a is a zero of a polynomial then (x  a) is a factor, and if a is a zero of a polynomial of multiplicity k then (x  a)^{k} is a factor. The second fact is that if the polynomial has real coefficients and a + bi is a zero then its complex conjugate a + bi is also a zero. Penny  


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