Răspuns :
cazul I
2x-1=3
2x3+1
x=4/2
x=2
cazul II
2x-1=-3
2x=-3+1
x=-2/2
x=-1
S={-1,2}
A={-1,2}
2x-1=3
2x3+1
x=4/2
x=2
cazul II
2x-1=-3
2x=-3+1
x=-2/2
x=-1
S={-1,2}
A={-1,2}