metode pemfaktokaran ײ+4×-21

Mapel : Matematika
Bab : Persamaan Kuadrat

x² + 4x - 21 = 0
= x² + 7x - 3x - 21
= x(x + 7)- 3(x + 7)
= (x - 3)(x + 7)

x₁ :
x - 3 = 0
x = 3

x₂ :
x + 7 = 0
x = - 7

Maaf Kalau Salah

ײ+4×-21
(x+7)(x-3)

• x+7 =0
x = -7

• x-3 = 0
x = 3

semoga membantu :)