Answer:
(a+2) Is your answer
Step-by-step explanation:
You could try synthetic division, but it's pretty complicated (not to mention for much harder problems), so you should try factoring this. What two numbers multiply up to 10 and add up to 7? Using trial and error, we would find these two numbers to be 2 and 5. Therefore, it factors into (a+5)(a+2).
29440 divided by 2 equals 14,720
A positive times a negative will always be negative
9 x -1 = -9
-9, Hope this helps!
Subtract
1/2x = 6
Divide/multiply
x = 12
Explanation
The question requires that we figure out the sides that represent the top/bottom faces and the left/right faces.
We are given the plan of the aluminum sheet
The top, bottom, left and right faces are shown below
The dimension for the top and bottom is

Since they are two
Therefore the total area for the top and bottom will be

For the left and right faces, the dimensions are
The dimensions of the left and right faces will be

Since they are two, then
The area will be