difference of two squares

Noun

 * 1)  The identity $$x^2 - y^2 = (x+y)(x-y)\,$$ that holds for all real numbers.
 * The fraction $$\frac{x-8}{x^2-64}$$ can be simplified to $$\frac{1}{x+8}$$ using the difference of two squares.

Translations

 * French: différence de carré
 * Russian: ра́зность квадра́тов
 * Spanish: diferencia de cuadrados
 * Swedish: konjugatregel
 * Thai: ผลต่างกำลังสอง