factorise the following 4a^2 - 9b^2
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Step-by-step explanation:
As we know that 4 is the square of 2 and 9 is the square of 3
therefore-
(2a)²-(3b)²
we know that a²-b²= (a+b)×(a-b)
=(2a+3b)×(2a-3b)
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