You can put this solution on YOUR website! Here is the original question:
(i)
Let U = x^(1/7). Doing this helps us to rewrite (i) as
(ii) .
Now factor (ii) to get
(iii)
and solve for U to get and
Now resub x^(1/7 back into U to get the values of x
x^(1/7) = 5 - - > x = 5^7
x^(1/7) = -2 - - > x = (-2)^7.
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