×2 + 8x + 15 = 0 melengkapkan persamaan kudrat

Question

Matematika Diposting : 2017-09-22 Diupdate : 2017-10-21 Qausar111

Pertanyaan

×2 + 8x + 15 = 0
melengkapkan persamaan kudrat

Answer 1

x² + 8x + 15 = 0
(x + 5) (x + 3)

Answer 2

X² + 8x + 15 = 0
(x+3)(x+5) = 0

x+3 = 0
x= -3

x + 5 = 0
x = -5