The length of the side joining points (-3, -1) and (1, 3) is given by

The length of the side joining points (1, 3) and (3, 1) is given by

The area of a rectangle is given by length times width.
Thus, the area of the given rectangle is given by
You’re answer would be -2a^2 + 48 - 6a^4
Answer:
20
Step-by-step explanation: