Hi, Could someone assist with this problem. F(x)=5x-x^3 Here is what I did: -x(x^2+5) I tried synthetic division using +-1, +-5, with no luck. Thanks. RB
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$5x-x^3 = x(5 -x^2) = x(\sqrt{5}-x)(\sqrt{5}+x)=0 \implies x=0, \, x= \pm \sqrt{5}$
Thank you very much, Skeeter!
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