melengkapkan kuadrat sempurna x²-3x+2=0

Bab Persamaan Kuadrat
Matematika SMP Kelas VIII

x² - 3x + 2 = 0
x² - 3x = -2
x² - 3x + (3/2)² = -2 + (3/2)²
(x - (3/2))² = -8/9 + 9/4
x - (3/2) = √(1/4)
x = (3/2) +- (1/2)

x1 = 3/2 + 1/2
    = 4/2
    = 2

x2 = 3/2 - 1/2
    = 2/2
    = 1

HP = { 1, 2 }