**Math III Section 4.6 problem #29**

A.Baker

"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**.