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प्रश्न
Factorise by the grouping method : a (a -4) - a + 4
बेरीज
उत्तर
a (a -4) - a + 4
= a( a - 4 ) -1( a - 4 )
= ( a - 4 )( a - 1 )
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Factorisation by Grouping
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