Please solve. Check all solutions.

3x - 4x^1/2 + 1 = 0

Let a=x^1/2, then a^2=x

So 3a^2-4a+1=0

(3a-1)(a-1)=0

a=1/3 or a=1

Therefore x^1/2=1/3 or x^1/2=1

x=1/9 or x=1

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