Question

What is the LCD of 1/a²-1 and 1/a+1​

Answer 1

see the person above

Explanation:

Answer 2

`a^(2) -1`

Explanation:

The LCD, or the lowest common denominator would be
`a^2-1`

If we multiply the second term
`(1)/(a+1)` by
`(a-1)/(a-1)` (
`(a-1)/(a-1)` is equivalent to 1, so we can do this,) we can see that the denominator would become the same as the first term
`(1)/(a^2-1)` by difference of squares. So that creates an LCD of
`a^2-1`