Question:সরল কর: ২.ছ. `(7529 xx 7529 - 7519 xx 7519)/(7529 - 7519)` 

Answer `(7529 xx 7529 - 7519 xx 7519)/(7529 + 7519)` `= ((7529)^2 - (7519)^2)/(7529 + 7519)` `= ((7529 + 7519) (7529 - 7519))/((7529 + 7519))` [সূত্র ব্যবহার করে] = 7529 - 7519 = 10 (Ans) 

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shorol karo: ২.cho. `(7529 xx 7529 - 7519 xx 7519)/(7529 - 7519)`
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