Posted by Unknown on Wednesday, August 29, 2012 at 11:20am.
let u = x^1/2. then you have
u^2 - 3u + 2 = 0
(u-2)(u-1) = 0
u = 1 or 2
so, x^1/2 = 1 or 2
x = 1 or 4
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