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प्रश्न
Factorise : ab2 - (a - c) b - c
योग
उत्तर
ab2 - (a - c) b - c
= ab2 - ab + bc - c
= ab (b - 1) + c (b - 1)
= (b - 1) (ab + c)
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Factorisation by Grouping
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