Question

Factorise:25a^2-49b^2​

Answer 1

Solution :-

➜ We will use a identity

➜ a^2 - b^2 = (a+b) (a - b)

➜ 25a^2 - 49b^2

➜ (5a)^2 - (7b)^2

➜ (5a + 7b) (5a - 7b)

Answer 2

By applying the identity (a^2 - b^2) = (a+b)(a-b)

= (5a)^2 - (7b)^2

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

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