Question

use suitable identity to find each of the following products (2a-1/2) (2a+1/2)​

Answer 1

Answer:

here we use a^2-b^2=(a+b)(a-b)

hence (2a-1/2) (2a+1/2) =4a^2-1/4

Answer 2

Identity: (a-b) (a+b)= a²-b²

Answer: (2a)²-(1/2) ²

4a²-1/4