Answer:

Step-by-step explanation:
Definition: Let f be one-to-one function with the domain A and the range B. Then the inverse function
has the domain B and the range A and is defined as

Facts:
1) For every

2) For every

So, 
12.
Start of with simply two times six, which is twelve. Since they're both negatives, they cancel each other out and become positive.
Hope this helps!
Answer:

Step-by-step explanation:

Start by distributing the
into all of the terms in between the second parentheses.

Next, distribute the
into all of the terms in between the second parentheses.

For the sake of simpler interpretation, I separated the two above, but they are together:

Since the terms are already in descending order, we do not need to rearrange them.