Question

Please Help!


Show your work including the tables and graphs.

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

Answer 1

you can first draw a graph to find the intercepts on x-axis
there will be up to 3 roots in this cubic polynomial
one will be close to 2
because 2(2)^3 - 9(2) + 3 = 16 - 18 + 3 = 1
use a graphical computer or the wolframalpha site
or you could plot points

i suggest you plot points from x = -5 to x = 5

Answer 2

i still dont get i. i graphed the equation and this is what i got..

Answer 3

looks good you have 3 zeros where the graph crosses the x-axis