2x2 - 5x + 2 = 0
4x2 - 10x + 4 = 0
4x2 - 10x = - 4 (multiplying both sides by 2)
(adding on both sides)
using a2 - 2ab + b2 = (a - b)2
(taking square root on both sides)
Hence the roots of equation are
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