questions are on attachment!!!
Last edited by CaptainBlack; Jul 19th 2006 at 11:51 PM.
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What seems to be the trouble?. Try the Rational Root Theorem.
First sketch the curve .
This appears to have a double root at , and it
checks out that is a root. Then dividing out gives: ,
from which the remaining roots can be found using the quadratic formula on: .
Use the same method as I suggested for part 1. Sketch the curve, looks
like a root at which checks out as a root. So is a
factor of , so divide it out to leave
a quadratic which can then be solved using the quadratic formula.
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