To calculate the sum of squares using Microsoft Excel, you need to input a specific formula into the formula bar of the cell you're working with.

What does it mean for something to be a sum of squares? Take the number 13. It’s the sum of two squares: 2 2 and 3 2. The number 34 is the sum of 3 2 plus 5 2. Instead of numbers, Hilbert’s ...

Which ones can be written as a sum of two squares? Each one is an odd number, so its remainder after dividing by 4 is either 1 or 3, and the result is very simply stated.