Numbers l and m both squared and added gives
(l+m)2
2(l+m)
l2+m2
l+m
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Answer:Add l^2 + m^2, m^2 + n^2, n^2 + l^2, 2lm + 2mn + 2nl
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l^2 + m^2, m^2 + n^2, n^2 + l^2, 2lm + 2mn + 2nl Adding we get, l^2 + m^2 + m^2 + n^2 + n^2 + l^2 + 2lm + 2mn + 2nl = 2l^2 + 2m^2 + 2n^2 + 2lm + 2mn .
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