Question

When is the following rational expression undefined? 6d-4

-------
d+2

Answer 1

For
`d=-2` rational expression will be undefined.

Explanation:

Given function is
`(6d-4)/(d+2)`

We need to find for what value of variable
`d` this rational expression will be undefined.

The rational expression will be undefined if the denominator of the expression will become zero.

So, let us plug denominator equal to zero.

`d+2=0\\\\Subtracting\ both\ side\ 2\\\\d+2-2=-2\\\\d=-2`

Hence, this rational expression will be undefined if the value of variable
`d=-2`.