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प्रश्न
Factorise : 3a2b - 12a2 - 9b + 36
योग
उत्तर
3a2b - 12a2 - 9b + 36
= 3a2 (b - 4) - 9 (b - 4)
= (b - 4) (3a2 - 9) = (b - 4) 3 (a2 - 3)
= 3 (b - 4) (a2 -3)
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Factorisation by Grouping
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