Question

Tolong kerjakan soal ini x² - 6x + 8 = 0 tolong soal smk

Answer 1

X² - 6x + 8 = 0
(x-4)(x-2)=0
x=4 x=2

Answer 2

Polanya :
ax² + bx + c = 0
x² - 6x + 8 = 0

jadi nilai
a = 1
b = -6
c = 8

cari perkalian yang hasilnya a × c = 1 × 8 = 8
cari penjumlahan yang hasilnya = b = -6

... × ... = 8
... + ... = -6

berapa angkanya ?

jawabannya :

-4 × -2 = 8
-4 + (-2) = -6

= ( x - 4 ) ( x - 2 ) = 0
= x - 4 = 0
= x = 4

atau

= x - 2 = 0
= x = 2

jawabannya :
x = 4 atau x = 2