Question

Rezolvați in multimea numerelor intregi ecuatia
| x+1 |=3
​

Answer 1

Salutare!

| x + 1 | = 3

I.

x + 1 = 3

x = 3 - 1

x = 2

II.

x + 1 = -3

x = -3 - 1

x = -4

S = { -4 ; 2 }

Answer 2

| x + 1 | = 3

avem o ecuatie de gradul intai in modul.

explicitam modulul =>

x + 1 = +3.
=> x = 2.

x + 1 = -3.
=> x = -4.