Question

The factorisation of (l + m)

2

– 4lm is

(a) (l – m)

2

(b) (l + m – 2)

2

(c) (l + m + 2)

2

(d) none of these.​

Answer 1

Step-by-step explanation:

(+m)2-4lm

l2+m2-2lm+4lm

l2+m2-2lm

(l-m)2 answer