Question

What is the difference of

Answer 1

Take (x-4)^2 as the denominator...

Answer 2

\[\rm = {x + 2 \over (x - 4)(x - 4)} - {x(x - 4) \over (x - 4)(x - 4)}\]

Answer 3

\[=\frac{x+2-x^2+4x}{(x-4)^2}\]

Answer 4

Now you will get your answer.. :)