anonymous
  • anonymous
When asked to find the zeros of the function r(x) = 5t3 – 8t2 + 7t + 2 which task do you complete first (Rational Root Theorem or Descartes’ Rule of Signs? Use complete sentences to explain your reasoning.
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
help
anonymous
  • anonymous
hey,
anonymous
  • anonymous
it doesn't matter which you do first....the rule of signs shows that there are either 2 positive or 0 positive roots.

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anonymous
  • anonymous
since the leading exponent is 3 then thee are 3 roots.
anonymous
  • anonymous
the rational root theorem will use the last term and the leading term...
anonymous
  • anonymous
2 which has factors of 2 and 1 and 5 which has factors of 5 and 1 therefore possible rational root would be +-2/5, +-2/1, +-1/5,+-1/1...
anonymous
  • anonymous
questions?

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