Posted by johnny on Tuesday, August 4, 2009 at 12:02pm.
sqrt(x) - sqrt (x-5) = 1 ---->
sqrt(x-5) = sqrt(x) - 1
Square both sides:
x - 5 = x + 1 - 2 sqrt(x) ------>
sqrt(x) = 3 ------->
x = 9
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