Question

l²+m²,m²+n²,n²+l²,2lm+2mn+2nl
???​

Answer 1

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+2nl

=2(l

2

+m

2

+n

2

+lm+mn+nl)