BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

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Answer: Option A

Explanation:

দ ে ও য় া আ ছ ে, {(a + b)}^{2} - {(a - b)}^{2} = (a^{2} + 2 a b + b^{2}) - (a^{2} - 2 a b + b^{2}) = a^{2} + 2 a b + b^{2} - a^{2} + 2 a b - b^{2}

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