gambar grafik fungsi y=x2+5x-6 memotong sumbu x

FUNGSI KUADRAT

memotong sumbu X jika y = 0

x^2 + 5x - 6 = 0
x^2 - x + 6x - 6 = 0
x(x - 1) + 6(x - 1) = 0
(x + 6)(x - 1) = 0
x + 6 = 0
x = -6

x - 1 = 0
x = 1

memotong sumbu X dititik (1,0) dan (-6,0)