Question

Melengkapkan kudrat sempurna x kuadrat kurang 3x kurang 10 sama dengan 0

Answer 1

Melengkapkan Kuadrat Sempurna

(a - b)² = a² - 2ab + b²

••

x² - 3x - 10 = 0

x² - 2.3/2 x + (3/2)² = 10 + (3/2)²

(x - 3/2)² = 40/4 + 9/4

(x - 3/2)² = 49/4 ✔

Akar2 PK

(x - 3/2)² = 49/4

x - 3/2 = ± √(49/4)

x = 3/2 ± 7/2

x1 = 3/2 + 7/2

x1 = 10/2

x1 = 5 ✔

x2 = 3/2 - 7/2

x2 = -2 ✔