Question

use a suitable identity to get each of the following products
(7a - 9b) (7a -96)​

Answer 1

(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

Answer 2

Answer:

I hope it's helpful for you

thanks