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Factorise: 4a2 – 9 |
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Answer» 4a2 – 9 can be written as (2a) 2 – (3)2 By using the formula a2 – b2 = (a+b) (a-b) Now solving for the above equation (2a)2 – (3)2 = (2a+3) (2a-3) |
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