Lösung 2.2:2d
Aus Online Mathematik Brückenkurs 1
First, we move all the terms over to the left-hand side
As the equation stands now, it seems that the best approach for solving the equation is to expand the squares, simplify and see what it leads to.
When the squares are expanded, each term inside a square is multiplied by itself and all other terms
After we collect together all terms of the same order, the left hand side becomes
After all simplifications, the equation becomes
Finally, we check that \displaystyle x=-2 is the correct answer by substituting \displaystyle x=-2 into the equation
