Question

tolong dibantu kak saya mau kumpul hari ini, soalnya ada di gambar, tolong ya kak plisss​

Answer 1

Jawab:
(b.) = 561
(c.) = 9

Penjelasan:
Diskriminan (D)
D = b²-4ac

(b.) x² + 23x - 8 = 0
ax² + bx + c = 0, maka
a = 1, b = 23, c = -8
D = b²-4ac
D = 23²-4(1)(-8)
D = 529+32
D = 561

(c.) 2x² - x - 1 = 0
ax² + bx + c = 0, maka
a = 2, b = -1, c = -1
D = b²-4ac
D = (-1)²-4(2)(-1)
D = 1 + 8
D = 9

(xcvi)

Answer 2

بِسْـــــــمِ اللّٰهِ الرَّحْمٰنِ الرَّحِيْمِ

Jawaban:

b. 561

c. 9

Penjelasan dengan langkah-langkah:

b. x² + 23x - 8 = 0

a = 1, b = 23, c = -8

D = b² - 4ac

= 23² - 4 × 1 × (-8)

= 529 - (-32)

= 529 + 32

= 561

c. 2x² - x - 1 = 0

a = 2, b = -1, c = -1

D = b² - 4ac

= (-1)² - 4 × 2 × (-1)

= 1 - (-8)

= 1 + 8

= 9

وَاللّٰهُ اَعْلَمُ بِاالصَّوَافَ