Item 16 a dentist's office and parking lot are on a rectangular piece of land. the area (in square meters) of the land is represented by x2+x-30. find the area of the land when the length of the dentist's office is 20 meters.

For this case, the first thing we should do is use the following equation:

x ^ 2 + x-30

Here, we substitute the value of x = 20

We have then:

(20) ^ 2 + (20) - 30 = 390 m ^ 2

Answer:

the area of the land when the length of the dentist's office is 20 meters is:

390 m ^ 2