Cara kerja X^2 +3x +2=0

Bab Persamaan Kuadrat
Matematika SMP Kelas VIII

x² + 3x + 2 = 0
x² + 2x + x + 2 = 0
x (x + 2) + 1 (x + 2) = 0
(x + 1) (x + 2) = 0
x + 1 = 0
x = -1

x + 2 = 0
x = -2

HP = { -1. -2 }