Question

Y= x²-5 dan y= 4x
tentukan himpunan persamaannya

Answer 1

Verified answer

Kelas 10 Matematika
Bab Persamaan dan Fungsi Kuadrat

y = y
x² - 5 = 4x
x² - 4x - 5 = 0
(x - 5) (x + 1) = 0
x - 5 = 0
x = 5

y = 4x
y = 4 . 5
y = 20

(5, 20)

x + 1 = 0
x = -1

y = 4x
y = 4 . (-1)
y = -4

(-1, -4)

HP = { (-1, -4), (5, 20) }