Given P(x) = x^3 - 3x^2 - 5x
a.evaluate P9x) for each integer value of x from -3 through 5
b. Find all zeros of P(x)
d. Prove that 5 is an upper bound on the zeros of P(x)
Do you not understand that this is integer arithmetic? Can you not multiply, add, and subtract integers?
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)?)