What is the axis of symmetry of h(x) = –2x2 + 12x – 3?
Answer
A
x = –15
B
x = –3
C
x = 3
D
x = 15
Explanation
For a quadratic h(x) = ax² + bx + c, the axis of symmetry is x = −b/(2a). Here a = −2 and b = 12, so x = −12/[2(−2)] = 3. The axis of symmetry is x = 3, choice C.
AI-written and checked against the verified answer.