Answer:
432 square feet
or 72*x^5 square feet
Step-by-step explanation:
Let's remember that the formula of the area of a rectangle is A = L*W, where L is the length and W the width.
In this case, L = 12*3 feet and W = 6*2 feet.
With this information,
A = 12*3 feet * 6*2 feet = 432 square feet
A = 432 square feet
But what you wrote can also be interpreted as L = 12*x^3 feet and W = 6*x^2 feet.
In that case, A = 12*x^3 feet * 6*x^2 feet = 72*x^5 square feet