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प्रश्न
Factorise by the grouping method : a4 - 2a3 - 4a + 8
योग
उत्तर
a4 - 2a3 - 4a + 8 = a3( a - 2 ) - 4( a - 2 )
= ( a3 - 4 )( a - 2 )
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Factorisation by Grouping
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