Question

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=?

Answer 1

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...

Answer 2

Thank you for the help Mr. Steve