find the roots of x square - 5 x + 2 is equal to zero by the method of completing the square

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x^2-5x+2=0, OR, (x - 5/2)^2 -25/4+2= 0, OR, (x - 5/2)^2 -17/4 = 0, OR, (x - 5/2)^2 = (√17/2)2, OR, x - 5/2 = +/- √17/2 => x= 5/2 +/- √17/2
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