Question

(7a-9b) (7a -9b) find thr product using a suitable Identity​

Answer 1

Answer:

(a-b)^2

Step-by-step explanation:

(7a-9b) is double so the identity is used for these equation is (a-b) ^2

Answer 2

Answer:

Use this identity

(a-b)(a-b) = a²-2ab+b²

Step-by-step explanation:

(a-b)(a-b) = a²-2ab+b²

(7a-9b)(7a-9b)= 49a²-126ab+81b²