Binomische Formeln

1. Binomische Formel \((a+b)^2=a^2+2ab+b^2\)
2. Binomische Formel \((a-b)^2=a^2-2ab+b^2\)
3. Binomische Formel \((a+b)\cdot (a-b)=a^2-b^2\)

Beispiele

\(\begin{array}[t]{lll}
(x+y)^2 \\[5pt]
= x^2+2xy+y^2
\end{array}\)
\(\begin{array}[t]{lll}
(5x-10y)^2 \\[5pt]
=(5x)^2-2\cdot 5x\cdot 10y+(10y)^2 \\[5pt]
=25x^2-100xy+100y^2 \\[5pt]
\end{array}\)
\(\begin{array}[t]{lll}
(x-4)^2  \\[5pt]
=x^2-2\cdot 4x+4^2  \\[5pt]
=x^2-8x+16
\end{array}\)
\(\begin{array}[t]{lll}
(x+2)\cdot (x-2)\\[5pt]
=x^2-2^2 \\[5pt]
=x^2-4 
\end{array}\)