Answer:
Step-by-step explanation:
The perimeter of the rectangle: We know that the frame is equal to 2(L+B)
therefore, the edge of a rectangle is 2[5a^2b^4 + 3ab^2]
= 2[ab^2(5ab^2 + 3)]
The area of a rectangle is L * B
= (5a^2b^4) * (3ab^2)
= 15a^3b^6