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where is the irror
oh
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(root13-root11)/(root13+root11)
rationalising this we get
(root13-root11)^2/2........... (1)
similarly rationalise other
so (root 13+root11)/(root13-root11)
we get .... (root13+root11)^2/2... . (2)
add (1) and (2)
(13 +11 +11+13)/2
= 48/2
=24
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