Question

Question #fb1f8

Answer 1

`A = l(l - 45)`

or

`A = l^2 - 45l`

Explanation:

Let's define the length of the soccer field as `l`.

The width of the soccer field can then be defined as `l - 45`

The formula for the area of a rectangle (a soccer field is assumed to be rectangular so it is valid to use this formula) is:

`A = l xx w`

Where:
`A` is the area
`l` is the length, which for this problem we have defined as `l`
`w` is the length, which for this problem we have defined as `l - 45`

Substituting our definition gives:

`A = l xx (l - 45)`

`A = (l xx l) - (l xx 45)`

`A = l^2 - 45l`