SUMX2MY2 Function in Excel calculates and returns the sum of differences of squares of numbers that has been passed as input. The SUMX2MY2 function is a builtin function in Excel that is categorized as a Math/Trig Function. It can be used as a worksheet function (WS) in Excel. As a worksheet function, the SUMX2MY2 function can be entered as part of a formula in a cell of a worksheet.
Syntax: =SUMX2MY2( array_x, array_y )
The SUMX2MY2 function syntax has the following arguments:
 Array_x Required. The first array or range of values.

Array_y Required. The second array or range of values.
Example: Let’s look at some Excel SUMX2MY2 function examples and explore how to use the SUMX2MY2 function as a worksheet function in Microsoft Excel:
Syntax: =SUMX2MY2 (A2:A8,B2:B8)
Result:
Based on the Excel spreadsheet above, the following SUMX2MY2 examples would return:
Syntax: =SUMX2MY2 (A3:A8,B3:B8)
Result: 17
Syntax: =SUMX2MY2 (A4:A8,B4:B8)
Result: 5
Syntax: = SUMX2MY2 ({2,2,3,1,4,4,5},{1,2,3,3,2,4,4})
Result: 16
Syntax: = SUMX2MY2 (A2:A4,{2; 3;1})
Result: 15
Syntax: = SUMX2MY2 (A2:A5,{2;3;1;2})
Result: 27
Syntax: = SUMX2MY2 (A2:A6,{2;3;1;2;3})
Result: 43
Note:
 The arguments should be either numbers or names, arrays, or references that contain numbers.
 If an array or reference argument contains text, logical values, or empty cells, those values are ignored; however, cells with the value zero are included.

If array_x and array_y have a different number of values, SUMX2MY2 returns the #N/A error value.