Question

Help?? Thanks if you do​

Answer 1

l = 6
`a^(4)` + 2a - 1

Explanation:

the area (A) of a rectangle is calculated as

A = lw ( l is the length and w the width )

given A = 18
`a^(5)` + 6a² - 3a and w = 3a , then

3aw = 18
`a^(5)` + 6a² - 3a ( divide each term by 3a )

w =
`(18a^(5) )/(3a)` +
`(6a^2)/(3a)` -
`(3a)/(3a)` = 6
`a^(4)` + 2a - 1