anonymous
  • anonymous
find roots of polynomial quation 2x^3+2x^2-19x+20=0 please explain
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
i am not alive
anonymous
  • anonymous
please help
anonymous
  • anonymous
synthetic division

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anonymous
  • anonymous
how plz show me
anonymous
  • anonymous
Ever done synthetic before or even long division polynomials?
anonymous
  • anonymous
yes but what do i divide by?
anonymous
  • anonymous
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.
anonymous
  • anonymous
but in my book the answer says 3+i/2 and -4, how?
anonymous
  • anonymous
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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