C-03-Q018mediumsingle_mcqab=(a+b)2−(a−b)2?ab = \dfrac{(a+b)^2 - (a-b)^2}{?}ab=?(a+b)2−(a−b)2a222b333c444d888ব্যাখ্যাSubtracting (a−b)2(a-b)^2(a−b)2 from (a+b)2(a+b)^2(a+b)2 cancels the squares and leaves 4ab4ab4ab, so dividing by 444 gives ab=(a+b)2−(a−b)24ab = \dfrac{(a+b)^2 - (a-b)^2}{4}ab=4(a+b)2−(a−b)2.