Lösung 2.1:1g
Aus Online Mathematik Brückenkurs 1
The expression in the exercise is of the form \displaystyle (a-b)^2 , where \displaystyle a=y^2 and \displaystyle b=3x^2 . With the help of the squaring rule \displaystyle (a-b)^2 =a^2 -2ab +b^2 , we have
