Question

factorise using suitable identity (5a+7b) (5a-7b)​

Answer 1

Answer:

Question:-

Factorise using suitable identity (5a+7b) (5a-7b)

Answer:-

Using the identity,

a²-b²=(a+b)(a-b)

Here,

a= 5a

b= 7b

(5a+7b)(5a-7b) = (5a)²-(7b)² = 25a²-49b²

Answer 2

Answer:

(5a +5a)(7b -7b)

10a-b