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प्रश्न
Find the square of 2a + b.
बेरीज
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उत्तर
We Know that
(a + b)2 = a2 + b2 + 2ab
(2a + b)2 = 2a2 + b2 + 2 × 2a × b
= 4a2 + b2 + 4ab
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