Question

Factorize the following step by step

Answer 1

Answer:

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Answer 2

9a^2 - 49b^2 this can be written as :

(3a)^2 - (7b)^2 [ here a = 3a and b = 7b so we can use identity : a^2 - b^2 = (a-b) (a+b) ]

(3a)^2 - (7b)^2 = (3a - 7b) (3a + 7b)