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Input h = - 2 into the expression

4[3(-2)  - 6]

  1 + (-2)

     4[-6  - 6]
=
      -1

     4[-12]
= 
      -1

     -48
= 
      -1
= 48

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