6.5 Dissecting a rectangle into Pythagorean triangles 219
Project: Factorablex^2 +px±q
Theorem 6.1.Letpandqbe relatively prime integers. The polynomials
x^2 +px±qare both factorable (over integers) if and only if|p|and
|q|are respectively the hypotenuse and area of a primitive Pythagorean
triangle.