TeX Quellcode:

{\dfrac{5}{2}wy+\dfrac{5}{8}y^2+\dfrac{5}{2}w^2 = \dfrac{5}{8}\left(4w^2+4wy+y^2\right) = \dfrac{5}{8}\left(2^2w^2+2\cdot 2\cdot 1wy+1^2y^2\right) = \dfrac{5}{8}\left(2w+y\right)^2}