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प्रश्न
Factorise the following by grouping the terms:
8(2a + b)2 - 8a -4b
योग
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उत्तर
8(2a + b)2 - 8a - 4b
= 8(2a + b)2 - (8a + 4b)
= 8(2a + b)2 - 4(2a + b)
= 4(2a + b)[2(2a + b) - 1]
= 4(2a + b)[4a + 2b - 1].
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Factorisation by Grouping
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