binomial formula Definition and 1 Threads

In Germany the formulas $$(a+b)^2=a^2+2ab+b^2$$ $$(a-b)^2=a^2-2ab-b^2$$ $$(a+b)(a-b)=a^2-b^2$$ are referred to as the first, second, and third "binomische Formel" (i.e. binomial formula). In German schools, these formulas are usually part of 8th grade syllabus. See here for example...