Question

Using complete sentences, explain how to find the zeros of the function f(x) = 2x^3 – 9x + 3.

Answer 1

unless you know cardanos stuff .... start with guessing

Answer 2

if you find 2 points that have opposite signs, you know there has to be a zero between them

Answer 3

when x=0, y = 3

has to be a zero inbetween here

when x=1, y=-4

has to be a zero inbetween here

when x=2, y=1

Answer 4

define the line between f(0) and f(1) and find its x intercept for a better guess

Answer 5

Then I have 3 and -4. Do I just do the (x+3) and (x-4) thing then? @amistre64