Theory

Sums of Squares Are Prime

It is important to remember that a sum of squares, such as a2+b2a^2 + b^2, does not factor into a product of binomials. Unlike a difference of squares, there are no binomial factors that multiply together to get a sum of squares. After removing any greatest common factor (GCF), the expression a2+b2a^2 + b^2 is prime.

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Updated 2026-04-30

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