Answer:
28
Step-by-step explanation:
3x² - 2x + 7
→ Substitute x = 3
3 × 3² - 2 × 3 + 7 ⇔ 3 × 9 - 6 + 7 ⇔ 27 - 6 + 7 ⇔ 21 + 7 ⇔ 28
