Question

Ada yang bisa bantu???​

Answer 1

Penjelasan dengan langkah-langkah:

30] f(x) = (x + 6)² - 5

f(x) = x² + 12x + 36 - 5

f(x) = x² + 12x + 31

a = 1; b = 12; c = 31

Sumbu simetri

= x

= -b/(2a)

= -12/(2 . 1)

= -6

Jawabannya D

31] f(x) = -x² + bx - 21

a = -1; b = b; c = -21

Sumbu simetri = 5

-b/(2a) = 5

-b = 5 . 2a

-b = 5 . 2 . (-1)

-b = -10

b = 10

Jawabannya A

Kode Kategorisasi : 10.2.5

Kelas 10

Pelajaran 2 - Matematika

Bab 5 - Persamaan dan Fungsi Kuadrat