2x2 - 7 x + 3 = 0 ..... solve it by completing square method
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2x2−7x+3=0
⇒2(x2−27x)+3=0
⇒2(x2−2×47x+1649)=849−3=825
(x−47)2=1625⇒x−47=±45
⇒x=47±45=3 or ±21
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