Question

Provide an example of two expressions that are conjugates of each other.

Answer 1

You need to know what a conjugate expression is first and you can easily come up with some yourself. You can even Google them, but for simplicity's sake:

a + b and a - b
c + d and c - d

Answer 2

In my view,., The sign of for a conjugate expression changes only for the complex value(iota)
so, If U write, (a,b) = a + bi , then its conjugate will be a - bi
i stands for iota