Răspuns:
Explicație pas cu pas:
a)
E =(x-2)²/(x-2)(x+2)-3/(x+2)=(x-2)/(x+2)-3/(x+2)=(x-2-3)/(x+2)=
=(x-5)/(x+2) x≠±2
b) E=1-3/(x+2) x∈Z
x+2=±1 x+2=1 x=-1
x+2=-1 x=-3
x+2=±3 x+2=3 x=1
x+2=-3 x=-5
A={-5,-3,-1,1}
