F(x) = 2x²-x-3 pembuat nol fungsi

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = 0
2x² - x - 3 = 0
2x² + 2x - 3x - 3 = 0
2x (x + 1) - 3(x + 1) = 0
(2x - 3) (x + 1) = 0
2x - 3 = 0
2x = 3
x = 3/2

x + 1 = 0
x = -1

HP = { -1, 3/2 }