Math III Section 4.6 problem #29

"Frank says: that since there is only one sign change in P(-x), that there must only be one negative real root."

So with the knowledge i gathered with the work above Frank is wrong because instead of 1 negative real root there are 1,3 negative real roots.

P(-x)=-x^3-x^2-x+1.  When it should have been P(-x)=-x^3+x^2-x+1.

Math III Section 4.6 problem #31

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