Question

cum se face? ajutați mă va rog

Answer 1

| |x+6| -7|=2
1. |x+6|-7=2
     |x+6|=9 a. x+6=9; x=3, 3∈S
                  b. x+6=-9; x=-15, -15∈S

2. |x+6|-7=-2
        |x+6|=5 a. x+6=5, x=-1, -1∈S
                     b x+6=-5, x=-11, -11∈S

verificam fiecare solutie
solutia x=3 ||3+6|-7|=2
x=-15 | |-15+6|-7|=|9-7|=2
x=-11 | |-11+6|-7|=|5-7|=2
x=-1  | |-1+6|-7|=|5-7|=2
S={-15; -11; -1; 3}