What's the Numbers equivalent to Excel's "A1:A10-B1"
In numbers, SUMPRODUCT (range, range…) takes the following arguments:

range:   A range of cells. range is a reference to a single range of
cells containing values of any type. If string or Boolean values are
included in range, they are ignored.
range…:   Optionally include one
or more additional ranges of cells. The ranges must all have the same
dimensions.

So you'll need to set up a range to perform the initial calculation (and squaring) and then sumproduct two simple ranges.