Tolong dijawab menggunakan caranya yaaa :)))

Bab Nilai Mutlak
Matematika SMA Kelas X

3|x + 3| <= |x - 3|

(3 (x + 3))² <= (x - 3)²
(3x + 9)² - (x - 3)² <= 0
(3x + 9 + x - 3) (3x + 9 - x + 3) <= 0
(4x + 6) (2x + 12) <= 0
4x + 6 <= 0
4x <= -6
x <= -6/4
x <= - 1 1/2

2x + 12 >= 0
2x >= -12
x >= -12/2
x >= -6
-6 <= x

-6 <= x <= - 1 1/2

HP = { x | -6 <= x <= -1 1/2, x € bilangan real }

✩✩ D ✩✩