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.

Question

anonymous · Answer

help

anonymous · Answer

hey,

anonymous · Answer

it doesn't matter which you do first....the rule of signs shows that there are either 2 positive or 0 positive roots.

anonymous · Answer

since the leading exponent is 3 then thee are 3 roots.

anonymous · Answer

the rational root theorem will use the last term and the leading term...

anonymous · Answer

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 · Answer

questions?