grafik y=2x kuadrat 2 -x-6 memotong sumbu x dititik...

Bab Persamaan Garis
Matematika SMP Kelas VIII

memotong sumbu x, maka y = 0
y = 0
2x² - x - 6 = 0
2x² - 4x + 3x - 6 = 0
2x(x - 2) + 3 (x - 2) = 0
(2x + 3) (x - 2) = 0
2x + 3 = 0
2x = -3
x = -3/2

x - 2 = 0
x = 2

titik potong = { (-3/2, 0), (2, 0) }