If x - y + z = 0 find fracy^22xz - fracx^22yz - fracz^22xy

Put x = z = 1

and y = 2

= \(\frac{{y}^{2}}{2xz}\) - \(\frac{{x}^{2}}{2yz}\) - \(\frac{{z}^{2}}{2xy}\)

= \(\frac{4}{2}\) - \(\frac{1}{4}\) - \(\frac{1}{4}\)

= \(\frac{3}{2}\)