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प्रश्न
Factorise:
6a2 - a - 15
योग
उत्तर
6a2 - a - 15
= 6a2 - 10a + 9a - 15
= 2a(3a - 5) + 3(3a - 5)
= (2a + 3)(3a - 5)
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