Question

use suitable identity to find the product of (3a-1÷2)(3a-1÷2)​

Answer 1

solution :

(3a-1/2)(3a-1/2) = (3a-1/2)2

using identity (a−b) 2 =a2 −2ab+b2

(3a− 1/2 )2 = (3a)2-2(3a)(1/2)+(1/2)2

= 9a2-3a+1/4