SOLUTION: 2x^3-5x+4=0 can you please explain to me step by step how to use the rational root theorem for the equation and then find any actual rational roots ?

Question 595295: 2x^3-5x+4=0

can you please explain to me step by step how to use the rational root theorem for the equation and then find any actual rational roots ?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
The possible rational roots are

where p is a factor of 4 and q is a factor of 2. Hence, the only possible rational roots are +/- 4, 2, 1, 1/2, 1/4. None of these work, so there are no rational roots.

Turns out that the only real root is x = -1.8868...
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