Question

X² - 3x - 4 = 0 ( rumus abc )​

Answer 1

Jawab:

Penjelasan dengan langkah-langkah:

x² - 3x - 4 = 0

a = 1

b = -3

c = -4

x12 = (-b ± √(b² - 4ac))/(2a)

x12 = (- (-3) ± √((-3)² - 4 . 1 . (-4)))/(2 . 1)

x12 = (3 ± √(9 + 16))/2

x12 = (3 ± √25)/2

x12 = (3 ± 5)/2

x1 = (3 + 5)/2

x1 = 8/2

x1 = 4

x2 = (3 - 5)/2

x2 = -2/2

x2 = -1

Maka, x1 = 4 atau x2 = -1

Detail jawaban

Kelas 8

Mapel 2 - Matematika

Bab 6 - Persamaan Kuadrat

Kode kategorisasi : 8.2.6

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