tolong dijawab kak pake cara!!! melengkapkan kuadrat sempurna. 3x^2 - 5 - 2 = 0

Bab Persamaan Kuadrat
Matematika SMP Kelas VIII

3x² - 5x - 2 = 0
3x²/3  - 5x/3 - 2/3 = 0
x² - 5x/3 = 2/3
x² - 5x/3 + (5/(2 . 3))² = 2/3 + (5/(2 . 3))² 
(x - 5/6)² = (2 x 12)/(3 x 12) + 25/36
(x - 5/6)² = 24/36 + 25/36
x - 5/6 = √(49/36)
x = 5/6 +- 7/6

x1 = 5/6 + 7/6
     = 12/6
     = 2

x2 = 5/6 - 7/6
     = -2/6
     = -1/3

HP = { -1/3, 2 }