SOLUTION: Please can you help me with this equation? x^2/3 - 8x^1/3+15=0

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Question 123923: Please can you help me with this equation?
x^2/3 - 8x^1/3+15=0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x^2/3 - 8x^1/3+15=0
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Let w = x^(1/3)
Substitute to get:
w^2-8w+15 = 0
Factor:
(w-5)(x-3)=0
w=5 or w=3
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solve for "x":
x^(1/3)= 5
x = 5^3= 125
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x^(1/3)=3
x = 3^3 = 27
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Final Answer: x = 125 or x=27
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Cheers,
Stan H.