## lornbeach 2 years ago Using complete sentences, explain how to find the zeros of the function f(x) = 2x^3 - 9x + 3.

1. tkhunny

Facoring if possible. Completing the Square or the Quadratic Formula, otherwise.

2. lornbeach

can you show me how to do it?

3. tkhunny

You've probably done it 100 times, already. Solve this for x: x + 2 = 0

4. tkhunny

Try this one: \(x^{2} - 1 = 0\)

5. tkhunny

6. ParthKohli

Here's how: Go to http://wolframalpha.com and type out `2x^3 - 9x + 3 = 0`. Scroll down to see the result.

7. tkhunny

You've been studying factoring and the Quadratic Formula. Now is the time to use these skills and tools!

8. timo86m

(2.*(x+2.271633299))*(x-.3422414369)*(x-1.929391862)

9. timo86m

so you factor to get (2.*(x+2.271633299))*(x-.3422414369)*(x-1.929391862)=0 get rid of 2 by dividing (x+2.271633299)*(x-.3422414369)*(x-1.929391862)=0 Then you just solve individually (x+2.271633299)=0 -> x=-2.27... (x-.3422414369)=0 -> x= .34... (x-1.929391862)=0 -> x=1.92...

10. tkhunny

Is it really \(x^{3}\) and not \(x^{2}\)?

11. timo86m

i think it may be x^2