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प्रश्न
Evaluate: (2a + 0.5) (7a − 0.3)
बेरीज
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उत्तर
(2a + 0.5) (7a − 0.3)
= 2a (7a − 0.3) + 0.5 (7a − 0.3)
= 14a2 − 0.6a + 3.5a − 0.15
= 14a2 + 2.9a − 0.15
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