Question

Sumplify pls
(l + 2n + m)² + (l - 2n + m)²​

Answer 1

Step-by-step explanation:

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)