To solve this problem you must apply the proccedure shown below:
1. You have the following expression given in the problem above:
2. The first thing you must do to factor the expression is to group the terms, as following:
3. Now, choose the greatest common factor of each group:
4. Now, you need to factor the expression by factoring out the 
The answer is:
The concept here is that if a country has a small population, then the per capita income would be large. by dividing the total income by the total population giving you the per capita income.
-hope this helps
ANSWER:
Let width be x, then length be 2x – 2
Now, Area of rectangle = L × B
- x(2x – 2) = 40
- 2x² – 2x – 40 = 0
- 2(x² – x – 20) = 0
- x² – x – 20
- x² –5x + 4x – 20 = 0
- x(x – 5) + 4(x – 5) = 0
- (x + 4)(x – 5) = 0
- x = – 4; 5
Hence, width can't be negative.
So width = 5in.
And Length = 2 × 5 – 2
So, <u>Correct choice</u> - [D] Length is 8 in, Width is 5 in.
