X2 + 6x + 5 = 0 ( tentukan dengan melengkapi KW) ​

melengkapi kuadrat sempurna

x² + 6x + 5 = 0

x² + 6x = -5

x² + 6x + (6/2)² = -5 + (6/2)²

x² + 6x + 3² = -5 + 3²

(x + 3)² = -5 + 9

(x + 3)² = 4

x + 3 = √4

x + 3 = ±2

x + 3 = 2

x = 2 – 3

x = -1

x + 3 = -2

x = -2 – 3

x = -5

HP = {-5, -1}

X2 + 6x + 5 = 0

(x + 5) ( x + 1)

x = (-5)

x = (-1)

Hp = (-5,-1)