Question

What is the common denominator


A
B
C
D

Answer 1

A.
`(x+2)(x-2)`

Explanation:

Denominator of the first fraction

`x^2-4`

Factor using difference of two squares;

`x^2-2^2=(x+2)(x-2)`

Denominator of the second fraction

`x+2`

The common denominator is the LCM of

`(x+2)(x-2)` and
`(x+2)`

Which is
`(x+2)(x-2)`