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प्रश्न
Factorise.
2x2 + x − 45
बेरीज
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उत्तर
2x2 + x − 45
= 2x2 + 10x − 9x − 45
= 2x(x + 5) − 9(x + 5)
= (2x − 9) (x + 5)
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