To solve this problem you must apply the proccedure shown below:
1. You have the following expression given in the problem above:
4(3h-6)/(1+h)
2. Then, if h is h=-2, you have to substitute this value into the expression given above, as below:
4(3h-6)/(1+h)
4(3(-2)-6)/(1+(-2))
3. Then, you have
4(-6-6)/(1-2)
4(-12)/-1
-48/-1
48
