C-03-Q013mediumsingle_mcqa2+b2=?a^2 + b^2 = ?a2+b2=? (Corollary 1)a(a+b)2−2ab(a+b)^2 - 2ab(a+b)2−2abb(a+b)2+2ab(a+b)^2 + 2ab(a+b)2+2abc(a+b)2(a+b)^2(a+b)2d(a−b)2(a-b)^2(a−b)2ব্যাখ্যাStarting from (a+b)2=a2+2ab+b2(a+b)^2 = a^2 + 2ab + b^2(a+b)2=a2+2ab+b2 and transposing 2ab2ab2ab gives a2+b2=(a+b)2−2aba^2 + b^2 = (a+b)^2 - 2aba2+b2=(a+b)2−2ab.