Răspuns:
Explicație pas cu pas:
(x-1) (y+2) =12=1*12=2*6=3*4=4*3=6*2=12*1
x-1=1...x=2
y+2=12....y=10
x-1=2..x=3
y+2=6.....y=4
x-1=3.......x=4
y+2=4........y=2
x-1=4..x=5
y+2=3...y=1
x-1=6....x=7
y+2=2.......y=0
x-1=12...x= nu conteaza
y+2=1....y=-1∉N, nu convine
iei primele 5 perechi de numere
