Question

What is the difference? X/x^2-16 minus 3/x-4

Answer 1

b

Explanation:

Answer 2

`(-2x-12)/(x^2-16)`

Explanation:

We want to find the difference;

`(x)/(x^2-16)-(3)/(x-4)`

The first denominator can be rewritten as;

`x^2-16=(x+4)(x-4)`

Therefore the least common denominator is
`x^2-16`

We collect LCD to obtain;

`(x-3(x+4))/(x^2-16)`

Expand the parenthesis to obtain;

`(x-3x-12)/(x^2-16)`

`(-2x-12)/(x^2-16)`