Question

Va rog, tot ceva complicat:)

Answer 1

Răspuns:

E(x)=(2-8/(x+2)):(x²-4x+4)/(x²-4)=

[2(x+2)-8}]/(x+2):(x-2)²/(x²-4)=

(2x+4-8)/(x+2)*(x²-4)/(x-2)²=

(2x-4)/(x+2)*(x-2)(x+2)/(x-2)²=

2(x-2)*1/(x-2)=2

Explicație pas cu pas: