SOLUTION: x^2/3-4x^1/3-5=0 Solve the equation after making the appropriate substituion, whatever that means.

Algebra ->  Exponents-negative-and-fractional -> SOLUTION: x^2/3-4x^1/3-5=0 Solve the equation after making the appropriate substituion, whatever that means.      Log On


   

Question 485511: x^2/3-4x^1/3-5=0
Solve the equation after making the appropriate substituion, whatever that means.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
x^2/3-4x^1/3-5=0
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Sub z for x^1/3
z^2 - 4z - 5 = 0
(z-5)*(z+1) = 0
z = -1, 5
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x^1/3 = -1
x = -1
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x^1/3 = 5
x = 125