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प्रश्न
Factorise by the grouping method : (2a-b)2 -10a + 5b
योग
उत्तर
( 2a - b)2 - 10a + 5b
= ( 2a - b )2 - 5( 2a - b )
= ( 2a - b )( 2a - b - 5 )
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Factorisation by Grouping
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