Question

rezolvati in multirea nr nat ecuatile (×-1)(y+1)=10
va rog

Answer 1

(x-1)(y+1)=10
in N avem posibilitatile : 1x10=10 2x5=10 5x2=10 10x1=10
var.1 1x10=10
x-1=1 => x=2
y+1=10 => y=9
var.2 2x5=10
x-1=2 =>x=3
y+1=5 => y=4
var 3 5x2=10
x-1=5 => x=6
y+1=2 =>y=1
var 4 10x1=10
x-1=10 => x=11
y+1=1 => y=0