Answer:
The correct option is 2.
Explanation:
It is given that the area of a rectangle is 8+12x and width of the rectangle is 4.
We need to find the dimensions of the rectangle.
Area of a rectangle is
![A=length* width](https://img.qammunity.org/2019/formulas/mathematics/college/13f5gmvhxmgyw6sqqr4etsk1pvrdjj0o03.png)
It means the factors of expression of area represent the dimensions.
The correct steps are shown below:
Step 1: 8 + 12x
Step 2: 4(2) + 4(3x)
Step 3: 4(2 + 3x)
Step 4: Dimensions of the rectangle are 4 and 2 + 3x.
Student made an error in step 2 and the correct step is 4(2) + 4(3x). Therefore the correct option is 2.