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lornbeach

  • 2 years ago

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

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  1. tkhunny
    • 2 years ago
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    Facoring if possible. Completing the Square or the Quadratic Formula, otherwise.

  2. lornbeach
    • 2 years ago
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    can you show me how to do it?

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

  4. tkhunny
    • 2 years ago
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    Try this one: \(x^{2} - 1 = 0\)

  5. tkhunny
    • 2 years ago
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    How about this one: \(x^{2} - 4x + 4 = 0\)

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

  7. tkhunny
    • 2 years ago
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    You've been studying factoring and the Quadratic Formula. Now is the time to use these skills and tools!

  8. timo86m
    • 2 years ago
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    (2.*(x+2.271633299))*(x-.3422414369)*(x-1.929391862)

  9. timo86m
    • 2 years ago
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    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
    • 2 years ago
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    Is it really \(x^{3}\) and not \(x^{2}\)?

  11. timo86m
    • 2 years ago
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    i think it may be x^2

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