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  • Add the following. (iv) l^2 + m^2 + n^2, n^2 + l^2, 2lm + 2mn + 2nl

Q : 3           Add the following.

                  (iv) l^2+m^2+n^2 , n^2+l^2, 2lm+2mn+2nl

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\\l^{2}+m^{2}+n^{2}+n^{2}+l^{2}+2lm+2mn+2nl\\ =2l^{2}+m^{2}+2n^{2}+2lm+2mn+2nl

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