Answer:
The width of Karen's Area Model is 3x^{2}+5
Step-by-step explanation:
The height of the first rectangle is 2 and the area is 6x^{2}. To get to 6x^{2} you have to multiply by 3x^2.
Similarly, to find the width of the other rectangle you multiply 5 by 2 to get to 10.
The answer is 3x^{2}+5
