Question

Evaluate each of the following expressions for: x = -2, y = -1, z = 3

(i) (x/y) + (y/z) + (z/x)
(ii) x2 + y2 + z2 - xy - yz - zx​

Answer 1

Answer:

i. (x/y) + (y/z) +(z/x) = -2.

ii. x2+y2+z2-xy-yz-zx= 21.