What are all the possible rational zeros for #f(x)=2x^4-9x^2+7#?
The rational roots are
This is simply a matter of factoring now, remember, to find the zeroes, you must set the equation equal to zero:
Using the quadratic formula:
(Note that a was used rather than x, as a is the variable used in the quadratic equation, we are finding the roots of a)
Therefore, as the question is asking for rational roots only,
Hope this helped, formatting took so long :P