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anonymous

  • 5 years ago

find roots of polynomial quation 2x^3+2x^2-19x+20=0 please explain

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  1. anonymous
    • 5 years ago
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    i am not alive

  2. anonymous
    • 5 years ago
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    please help

  3. anonymous
    • 5 years ago
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    synthetic division

  4. anonymous
    • 5 years ago
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    how plz show me

  5. anonymous
    • 5 years ago
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    Ever done synthetic before or even long division polynomials?

  6. anonymous
    • 5 years ago
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    yes but what do i divide by?

  7. anonymous
    • 5 years ago
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    You first try 1. If it comes out with no remainder it is a root. If it doesn't try -1. That is how you start all these problem. It is trial and error, but they make em simple so you can do it.

  8. anonymous
    • 5 years ago
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    but in my book the answer says 3+i/2 and -4, how?

  9. anonymous
    • 5 years ago
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    That is because someone has tried 1 and -1 and found that there is a remainder. Then on to -4. Try -4, you know it is a root but the synthetic division would give you the rest of the polynomial.

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