Question

factorise: (l+m)² - (l-m)²​

Answer 1

Answer:

the answer is 4LM. this is

Answer 2

Answer:

a²-b²=(a+b)(a-b)

(l+m)² - (l-m)²

(l+m+l-m)(l+m-l+m)

(2l)(2m)=4lm