Lösung 2.3:1a
Aus Online Mathematik Brückenkurs 1
If we consider the rule
and move \displaystyle a^{2} over to the left-hand side, we obtain the formula
With the help of this formula, we can rewrite (complete the square of) a mixed expression \displaystyle x^{2}-2ax to a obtain a quadratic expression, \displaystyle (x-a)^{2}-a^{2}.
The expression \displaystyle x^{2}-2x corresponds to \displaystyle a=1 in the formula above and thus
