pake cara yaa, anw thanks!

Kelas 10 Matematika
Bab Barisan dan Deret Bilangan

α + 3 = x
α = x - 3

x² + 5x + 3 = 0
(x - 3)² + 5 (x - 3) + 3 = 0
x² - 6x + 9 + 5x - 15 + 3 = 0
x² - x - 3 = 0

a = 1; b = -1; c = -3.

a + b + c = 1 + (-1) + (-3)
a + b + c = -3

smoga membantush_!

#sameanswer, differentway