Question

De rezolvat!! Urgent

Answer 1

Răspuns:

a) | 2 x + 3 | - 4 × | 2 - ( 2x + 5 ) | = - 27

| 2x + 3 | - 4 × | 2 - 2x - 5 | = - 27

| 2x + 3 | - 4 × | - 3 - 2x | = - 27

| 2x + 3 | - 4 × | - ( 2x + 3 ) | = - 27

| 2x + 3 | - 4 × | 2x + 3 | = - 27

- 3 × | 2x + 3 | = - 27

| 2x + 3 | = 9

2x + 3 = 9 => 2x = 9 - 3 => 2x = 6 => x = 3

2x + 3 = - 9 => 2x = - 9 - 3 => 2x = - 12 => x = - 6

x1 = - 6 ; x2 = 3

x ∈ { - 6 , 3 }