Question

3. 3. 3
(x-y)+(y-z)+(z-x) ​

Answer 1

1. (x+y)+(y-z)+(z-x)

= first we open the brackets

= x+y+y-z+z-x

= then, the +x is canceled by -x.

= +z is canceled by -z.

= y+y = y²

Hence, the answer is y².