Pembahasan:
y = (x – 6)(x + 2) = x² – 4x – 12
• Sumbu simetri x = -b = 4 = 2
2a 2.1
• y = x² – 4x – 12
= 2² – 4.2 – 12
= –16
Koordinat titik balik (2, -16)
Kabar Masyarakat, Gaya Santai
Pembahasan: