express 1.2bar in the form of rational number(p/q,q) and by using p,q values verify the identity (p-q)^2-p^2 2pq q^2
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1.2bar...11/9
(p-q)^2
(11-9)^2 -(11+9)^2
2^2 - 20^2
4-400
396........
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