Question

hey im really struggling with identities, class 8
please solve this question:
( pq + 2 ) ( pq – 2 )
please explain it step by step with calculations, it would be a great help if anyone would solve it
thank you

Answer 1

Step-by-step explanation:

Hello,

In this question, an identity is used

i.e, (a+b)(a-b)= a2-b2

Therefore, evaluating the values,

pq sq. - 2sq.

Answer 2

since a^2-b^2=(a+b)(a-b)

by this u can get the answer