Factorise : 2a² - 72b²
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Step-by-step explanation:
hope this is the correct answer but I am not sure.
Really sorry.
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Step-by-step explanation:
2 ( a² - 36 b² )
By using identity a² - b² = ( a + b )( a - b )
2 ( a + 6b ) ( a - 6b ) ANS...
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