Respuesta :

Answer:

10x+25

Step-by-step explanation:

The area of the large square is

A= s^2 where s is the side length

A =(x+5)^2

FOIL

  x^2 +10x +25

The small square has an area of

A =(x)^2

The difference is

A large minus A small

x^2 +10x +25 - x^2

10x+25