It's 21 square units. If you map it on a complex plane (x-axis is real numbers, y-axis is imaginary numbers) you'll see that the sides of the rectangle is 3 and 7 which multiply to 21.
Answer:
4 1/3
Step-by-step explanation:
Simply get rid of the alphabets you don't want and you have the answer. hope this helps. be sure to give me the brainliest answer