Question

Using a suitable identity, find the product of (7a - b)(7a-b)​

Answer 1

Answer:

81b ²

Step-by-step explanation:

(7a−9b)(7a−9b)=(7a−9b) ²

 

using the identity (a−b) ²

=a ²

−2ab−b ²

 

(7a−9b) ²

=(7a) ²

−2×7a×9b+(9b) ²

 

(7a−9b)(7a−9b)=49a ²

−126ab+81b ²

PLEASE MARK AS BRAINLIEST!!!!