Benutzer:Hourssales/Beweis

${\displaystyle {\begin{aligned}\mathrm {a} &=\mathrm {b} \\\mathrm {a} ^{2}&=\mathrm {ab} \2円\mathrm {a} ^{2}&=\mathrm {a} ^{2}+\mathrm {ab} \2円\mathrm {a} ^{2}-2\mathrm {ab} &=\mathrm {a} ^{2}-\mathrm {ab} \2円\mathrm {a} (\mathrm {a} -\mathrm {b} )&=\mathrm {a} (\mathrm {a} -\mathrm {b} )\2円&=1\4円&=2\3円&=1\ qed\end{aligned}}}${\displaystyle {\begin{aligned}\mathrm {a} &=\mathrm {b} \\\mathrm {a} ^{2}&=\mathrm {ab} \2円\mathrm {a} ^{2}&=\mathrm {a} ^{2}+\mathrm {ab} \2円\mathrm {a} ^{2}-2\mathrm {ab} &=\mathrm {a} ^{2}-\mathrm {ab} \2円\mathrm {a} (\mathrm {a} -\mathrm {b} )&=\mathrm {a} (\mathrm {a} -\mathrm {b} )\2円&=1\4円&=2\3円&=1\ qed\end{aligned}}}