SOLUTION: simplify expression (9x-1)^1/2 - (x+8)(9x-1)^-1/2 I tried putting negative on bottom to cancel out with other term, but answer is still wrong. What do I have to do?

SOLUTION: simplify expression (9x-1)^1/2 - (x+8)(9x-1)^-1/2 I tried putting negative on bottom to cancel out with other term, but answer is still wrong. What do I have to do?

Algebra.Com

Question 344638: simplify expression
(9x-1)^1/2 - (x+8)(9x-1)^-1/2
I tried putting negative on bottom to cancel out with other term, but answer is still wrong. What do I have to do?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
(9x-1)^1/2 - (x+8)(9x-1)^-1/2
----------
Common Factor: (9x-1)^(-1/2)
------------------
= (9x-1)^(-1/2)[(9x-1)-(x+8)]
----
= [8x-9]/sqrt(9x-1)
============================
Cheers,
Stan H.
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