a. Do you expect us do this for you?
b. Part (a) gives you one zero; use polynomial long division to get a quadratic equation, which gives you the other two zeros.
c. Estimate the value of square roots from (b). E.g., .
You can factor an "x" out to P(x) easily, leaving a quadratic term. Do you know the quadratic formula?b. Find all zeros of P(x)
You just need an estimate of the square root that shows up in (b).d. Prove that 5 is an upper bound on the zeros of P(x)
(What happened to (c)?)