2. give an example of a cubic binomial polynomial

The width of the rectangle will be 16 unit.

Explanation: Since, Given- 192 square unit is the area of the rectangle.

but again, according to the the area is represent by the expression

Then, Steps will be- Step 1:

Step2:x(x+4) = 192, where x is the length of the rectangle. And the width is x+4.

Step3:  

Step4: (x+16)(x-12)=0

Because the lenght can not be negative, the lenght is 12 and width is 16.

so, option 4th will be right.