Find the common theme with all these numbers. ( Except for the fact that all of them are wrong )
242 + 32 = 450
252 + 567 = 1575
507 + 147 = 1200
1805 + 20 = 2205
570312 + 19208 = 798848
Each of the numbers inclusive of the five rows are written without the square root symbol, which is necessary for equality in each of the said rows.