Question

Which shows all the values of a that make the rational expression 3a2-27/324-4a2 undefined?

Answer 1

C (3rd selection) on Edge

Explanation:

Just passed the test with a 100%.

Answer 2

This expression will become undefined at a=-9 and a=9

Explanation:

We are given rational expression as

`(3a^2-27)/(324-4a^2)`

We know that any rational expression is undefined when it's denominator becomes 0

so, we can set denominator =0

and then we can solve for 'a'

`324-4a^2=0`

now, we can factor it

`4(81-a^2)=0`

`(81-a^2)=0`

`(9-a)(9+a)=0`

`(9-a)=0`

`a=9`

`(9+a)=0`

`a=-9`

So,

This expression will become undefined at a=-9 and a=9