Question

X + Y + Z is equal to zero then x square by Y Z + Y square by 2 X + Z Square by X y​

Answer 1

X + Y + Z = 0

THEN, $X^{3} + Y^{3} + Z^{3}$ = 3XYZ

   ⇒ $\frac{X^{2}}{YZ} + \frac{Y^{2}}{ZX} + \frac{Z^{2}}{XY}$

       = $\frac{X^{3} + Y^{3} + Z^{3}}{XYZ}$

       = $\frac{3XYZ}{XYZ}$

       = 3