Question

Determinati x , y apartine Z astfel incat : a) 7:x = y b) 12 : (x-1) =y+2 va rog

Answer 1

7=xy= 1*7=7*1=(-7)*(-1)=(-1)*(-7)

x=1. y=7

x=7, y=1

x=-1, y=-7

x=-7, y=-1

12=(x-1)(y+2)= 1*12=(-1)*(-12)=2*6 =(-2)*(-6)=3*4=(-3)*(-4)=4*3=(-4)*(-3)=6*2=(-6)*(-2)=12*1=(-12)*(-1)

vom avea 12 solutii, 12v perechi x, y determinate astfel

x-1=1...x=2

y+2=12...y=10

x-1=-1...x=0

y+2=-12...y=-14

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x-1=-12...x=-11

y+2=-1....y=-3