Question

{(a+1)^2 - (a-1)^2} = ?​

Answer 1

Answer:

step by step explanation

Answer 2

Answer:

As we know the formula a^2-b^2=(a+b)(a-b)

=(a+1+a-1)(a+1-a+1)

=a*2

=2a

Therefore, answer will be 2a