Question

(x + 2)2 + (x + 2).(x-2) + (x - 2)2 =
​

Answer 1

Resposta:

(x + 2)2 + (x + 2).(x-2) + (x - 2)2

2x+4+(x+2).(x-2)+(x-2).2

2x+4+x²-4+(x-2).2

2x+4+x²-4+2x-4

2x+x²+2x-4

4x+x²-4

x²+4x-4