Question

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

Answer 1

alright for this function, you cannot simply factor it since you have a power of 3

you will have to use synthetic division or long division

first find all the multiples of 3

+-1,+-3

now do you know how to do synthetic division

Answer 2

First make a list of the possible rational zeros.
Then use synthetic division to find the rational zeros if there are any.
After finding one rational zero, factor the remaining quadratic factor.
If it won't factor, use the quadratic formula to find the remaining zeros.

Answer 3

u can do this by graphing it to get an idea of the roots, then get a more exact value or values by trial and improvement

Answer 4

i rather do it by graphing

Answer 5

how do you do it by graphing?

Answer 6

the roots are radicals

Answer 7

you have to use a substitution or a graphing calc

Answer 8

http://www.wolframalpha.com/input/?i=f%28x%29+%3D+2x%5E3+%E2%80%93+9x+%2B+3

Answer 9

http://www.wolframalpha.com/input/?i=0+%3D+2x%5E3+%E2%80%93+9x+%2B+3

Answer 10

so what would the answer be?