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Question
Factorise : 50a3 - 2a
Sum
Solution
50a3 - 2a
= 2a( 25a2 - 1 )
= 2a[ (5a)2 - (1)2 ]
= 2a( 5a + 1 )( 5a - 1 ) [ ∵ a2 - b2 = ( a + b )( a - b )]
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Method of Factorisation : Difference of Two Squares
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