Answer:
Step-by-step explanation:
To find the domain, find where the curves intersect
x² - 3x = 3x
x² = 6x
x = 0, x = 6
integrate from x = 0 to 6 the difference between the curves
A =∫ 3x - (x² - 3x)dx
A =∫ (6x - x²)dx
A = 3x² - x³/3
A = 3(6)² - (6)³/3 - (3(0)² - (0)³/3)
A = 36 units²
