Question

Factorise
(l +m)^2 – (l -m)^2​

Answer 1

Answer:

4lm

Step-by-step explanation:

A simple question with a very simple explaination.

Using the identity :-

=> (a+b)(a-b)= a²-b²

Here,

=> a = l+m

=> b= l-m

So,

=> (l+m+l-m)(l+m-l+m)

=> 2l x 2m

=> 4lm.

Ans.

Answer 2

Answer:

4lm......................