Question

Pls help me

The area of a square is x2+14x+c.

let x = 4. find the area of the square
Area =

Find the length of the side of the square.
side =

Answer 1

Explanation:

when x=4

area=4²+14×4+c=16+56+c=72+c

8²=64

9²=81

72+c=81

c=81-72=9

area=81 units²

length of each side=√81=9 units