SOLUTION: Solve a) x^(1/2) - x ^(1/4) - 2 = 0 Can you please help me out? Thanks so much in advance:)

Question 810579: Solve
a) x^(1/2) - x ^(1/4) - 2 = 0
Can you please help me out? Thanks so much in advance:)
Found 2 solutions by stanbon, Okeke_Christian:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve
a) x^(1/2) - x ^(1/4) - 2 = 0
-------
This is a quadratic equation with variable x^(1/4)::
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Factor:
(x^(1/4)-2)(x^(1/4)+1) = 0
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x^(1/4) = 2 of x^(1/4) = -1
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x = 2^4 = 16
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Note:: x^(1/4) = -1 has an extraneous solution.
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Cheers,
Stan H.
Answer by Okeke_Christian(26) (Show Source): You can put this solution on YOUR website!
x^(1/2) - x ^(1/4) - 2 = 0

You raise each term by a power of four, like so:

The equation becomes:

...and just from me to you, I don't think that equation has any roots; SEE:
from
a= 1; b= 1; c=16
Substitute

...and personally, I don't think that
will give anything besides a "MA ERROR".
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