Question

(×+2)2
Desenvolver algebricamente

Answer 1

(x + 2)² = (x + 2) . (x + 2) =  x² + 4x + 4

x + 2  
x + 2
--------------
x² + 2x
    + 2x + 4
---------------------
x² + 4x + 4

Answer 2

(x + 2)² = x² + 2.2x + 2² = x² + 4x + 4

ou

(x + 2)² = (x + 2).(x + 2) = x² + 2x + 2x + 2² = x² + 4x + 4