maaf yang tadi tidak ada soal...

y = x - 1
f(x) = y = x^2 - 4x + 3

x^2 - 4x + 3 = x - 1
x^2 - 5x + 4 = 0
(x - 4)(x - 1) = 0
x = 4 atau x = 1

Jadi, x1 + x2 = 4 + 1 = 5

Jawaban D

y = x - 1
f ( x ) = x² - 4x + 3

x² - 4x + 3 = x - 1
x² - 5x + 4 = 0
( x - 1 ) ( x - 4 ) = 0
x = 1 atau x = 4

x1 + x2 = 1 + 4
x1 + x2 = 5 ✔️

Opsi D. 5 ✔️

Semoga bermanfaat.....
-Prisco