Question

add -
l^2 + m, m^2 +n^2 + 1^2 ,2 LM+ 2mn +2 nl
plz give the answer fast.​

Answer 1

L^2+M^2+M^2+N^2+N^2+L^2

2L^2+2M^2+2N^2

2(L^2+M^2+N^2)

2Lm+2mn+2nl

2(lm+mn+nl)