Question

Tentukan semua titik potong grafik fungsi kuadrat y= x² - 6x + 4 dengan fungsi kuadrat y = x² - 8x.

Answer 1

Y1 = x² - 6x + 4

y2 = x² - 8x

y1 = y2

x² - 6x + 4 = x² - 8x

x² - x² + 8x - 6x = -4

2x = -4

x = -2

y1 = (-2)² - 6(-2) +4

y1 = 4 + 12 + 4

y1 = 20

y2 = (-2)² - 8(-2)

y2 = 4 + 16

y2 = 20

tipot = { -2 , 20 }