Question

1) Simplify:
(l+ m + n)2 + (l -m+n)?​

Answer 1

Step-by-step explanation:

= (l+m+n)2 +(l-m+n)

= 2 l+2 m+2 n+l-m+n

=2 l+l+2 m-m+2 n+n

= 3 l +m+3 n