Question 1140376
this is (x+2)(x-2) for numerator, difference of squares
divided by (2-x)(4+2x+x^2) difference of cubes
The x-2 cancels IF we multiply the denominator by -1 and the whole fraction by -1.
Then we have -(x+2)/(4+2x+x^2)

The second - turns (2-x) into (x-2), which can cancel.