Q. 24.1( 14 Votes )

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Answer :

We have,


4a2 – 9


= (2a)2 – (3)2


By using the formula a2 – b2 = (a + b)(a – b)


We get,


4a2 – 9 = (2a)2 – (3)2


= (2a + 3)(2a – 3)


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