Answer:
The area of the entire rectangle is given by: x^3 + 11x^2 + 18x
Step-by-step explanation:
The calculation of its area is straightforward, we only need to multiply its height times its width:
A = (x + 9)(x^2 + 2x)= x^3 + 2x^2 + 9x^2 +18x = x^3 + 11x^2 + 18x
Therefore the are are of the entire rectangle is given by: x^3 + 11x^2 + 18x
