20. Solve for x, y and z. x + xy + xz = -12 y + yz + xy = 30 z + xz + yz = 18

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x^{2} + x y + x z = 18

y^{2} + y z + y z + 12 = 0

z^{2} + z x + z y = 30

The value of $52 x y z (x y + y z + x z + y^{2}) (z + x) \times 104 x y (x y + x z + y z + y^{2})$ is:

If x+y+z=6, xy+xz+yz=11, xyz=6 thenequals

x^{2} + x y + x z = 18,

y^{2} + y z + y x + 12 = 0,

z^{2} + z x + z y = 30.

x + y + z = 6, x y + x z + y z = 11, x y z = 6

\frac{x}{y z} + \frac{y}{x z} + \frac{z}{x y}

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