SOLUTION: I need help on solving this step by step , i don't know how to go about this problem when it has fractions. Find the real solutions of the equation. x2/3 - 2x1/3

SOLUTION: I need help on solving this step by step , i don't know how to go about this problem when it has fractions. Find the real solutions of the equation. x2/3 - 2x1/3 - 15 = 0

Question 411649: I need help on solving this step by step , i don't know how to go about this problem when it has fractions.
Find the real solutions of the equation.
x2/3 - 2x1/3 - 15 = 0
Answer by emargo19(101) (Show Source): You can put this solution on YOUR website!
x2/3 - 2x1/3 - 15 = 0
1/3 - 2x1/3 - 15 = 0
Let x1/3=u
Therefore the equation is

or
or

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