Question 312255
From 3/(2-x) + 4/(x^2-4), let's multiply the first term by -1/-1 and factor the denominator of the second term to get
-3 / (x-2) + 4 / (x-2)(x+2)
Now multiply the first term by x+2/x+2 and get
-3(x+2) / (x-2)(x+2) + 4 / (x-2)(x+2)
and we get
(-3x - 2) / (x-2)(x+2)