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प्रश्न
Factorise by the grouping method : a3 + a - 3a2 - 3
योग
उत्तर
a3 + a - 3a2 - 3
= a (a2 + 1) - 3(a2 + 1)
= (a2 + 1) (a -3).
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Factorisation by Grouping
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