SOLUTION: x^2/5 -x^1/5 -12=0 Solve by substitution

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Question 310375: x^2/5 -x^1/5 -12=0
Solve by substitution
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let u=x%5E%281%2F5%29, then u%5E2=x%5E%282%2F5%29.
u%5E2-u-12=0
%28u-4%29%28u%2B3%29=0
Two solution:
u-4=0
u=4
x%5E%281%2F5%29=4
x=4%5E5
highlight%28+x=1024%29
.
.
.
u%2B3=0
u=-3
x%5E%281%2F5%29=-3
x=%28-3%29%5E5
highlight%28+x=-243%29