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Find all Real solutions of the Equation:

(ENter as comma sparated answers, if there are no real solutions then just leave as NRS)

x^(4/3)-9x^(2/3)+14=0

x=?

2 answers

set u = x^(2/3)
then you have

u^2-9u+14 = 0
(u-2)(u-7) = 0

so, that means

x^(2/3) = 2
x^(2/3) = 7

I expect you can handle that, now...
Thank you for the help Mr. Steve