Answer:
The dimensions are:
by 
Step-by-step explanation:
The area of the rectangle is given as

The factored form of this quadratic trinomial gives the dimensions of the rectangle.
We factor 3 first to obtain;

We split the middle term to get;

We factor within the parenthesis to get;

We factor further to get;

The dimensions are:
by 
Then the perimeter will be

3 times the sum of b and f, can also be written as: 3(b+f)
Answer: divide 2 and 3 then divide 3 and 4 from the answers you get divide them and simplify if necessary
Step-by-step explanation: