SOLUTION: i am stumped as to how to solve this problem. using the rational zero theorem to find the possible zeros of: p(x)= 2x^3-5x^2+2x-9. thank you so much!!

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: i am stumped as to how to solve this problem. using the rational zero theorem to find the possible zeros of: p(x)= 2x^3-5x^2+2x-9. thank you so much!!      Log On


   

Question 106688: i am stumped as to how to solve this problem. using the rational zero theorem to find the possible zeros of: p(x)= 2x^3-5x^2+2x-9. thank you so much!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
using the rational zero theorem to find the possible zeros of:
p(x)= 2x^3-5x^2+2x-9
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Rational zeroes must have the form a/b where:
a is a divisor of 2 and b is a divisor of -9
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But:
The easiest way to do these is to graph with a graphing calculator, then
use synthetic division.
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graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x%5E3+-+5x%5E2+%2B+2x+-9%29
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Rational root at x = 2.7357315...
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That is a messy root. Are you sure you posted your problem correctly?
Cheers,
Stan H.