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प्रश्न
Factorise : a2 - 3a - 40
बेरीज
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उत्तर
a2 - 3a - 40
= a2 - 8a + 5a - 40
= a( a - 8 ) + 5( a - 8 )
= ( a - 8 )( a + 5 )
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