Question

Question 1
What is the axis of symmetry to the following:
f(x) = x² + 2x – 8

Answer 1

x = - 1

Explanation:

Given a parabola in standard form , f(x) = ax² + bx +c ( a ≠ 0 )

Then the axis of symmetry is calculated using

x = -
`(b)/(2a)`

f(x) = x² + 2x - 8 ← is in standard form

with a = 1 and b = 2 , then axis of symmetry is

x = -
`(2)/(2)` = - 1, that is

x = - 1

Answer 2

Answer: x = -1

Explanation: