What should come in place of the question mark (?) in the following questions?
Expression : $(45)^{2} + (21)^{2} = (?)^{2} + 257$
=> $2025 + 441 = (?)^2 + 257$
=> $?^2 = 2466 - 257$
=> $? = \sqrt{2209} = 47$
Expression : $(45)^{2} + (21)^{2} = (?)^{2} + 257$
=> $2025 + 441 = (?)^2 + 257$
=> $?^2 = 2466 - 257$
=> $? = \sqrt{2209} = 47$