Question

DAU COROANA SI PUNCTE! va rog din suflet e urgent ex 15​

Answer 1

Răspuns:

2(x + 15)² = 32 | : 2

(x + 15)² = 16

x + 15 = ± 4

x + 15 = 4 => x = 4 - 15 = - 11

x + 15 = - 4 => x = - 4 - 15 = - 19

3(x - 12)² = 75 | : 3

(x - 12)² = 25

x - 12 = ± 5

x - 12 = 5 => x = 17

x - 12 = - 5 => x = 7

4(4x + 1)² = 36 | : 4

(4x + 1)² = 9

4x + 1 = ± 3

4x + 1 = 3 => 4x = 2 => x = 1/2

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

7(3 - 5x)² = 28 | : 7

(3 - 5x)² = 4

3 - 5x = ± 2

3 - 5x = 2 => 1 = 5x => x = 1/5

3 - 5x = - 2 => 5 = 5x => x = 1