Question

daca modul de x-2 = 5, atunci x apartine carei multimi
?

Answer 1

Explicație pas cu pas:

x-2=5

x=5+2

x=7

V: 7-2=5

Answer 2

| x-2|=5

1. x-2= -5

x= -5+2

x= -3

2. x-2=5

x=5+2

x=7

x∈{ -3,7}