Question

The perimeter of the rectangle is 18a3 - 8a2 + 14a + 6 . If one of the side is 12a2 + 4a. Find the other side​

Answer 1

here length is 12a²+4a

perimeter=2(l+b)

18a³-8a²+14a+6=2(12a²+4a+b)

18a³-8a²+14a+6=24a²+8a+2b

18a³-8a²-24a²+14a-8a+6=2b

18a³-32a²+6a+6=2b

b=2(9a³-16a²+3a+3)/2

b=9a³-16a²+3a+3