Question

Suppose the equation of the axis of symmetry for a quadratic function is x = 3 and one of the x-intercepts is 8. What is the other x-intercept?

Answer 1

-2

Explanation:

The axis of symmetry divides the quadratic exactly in half. If one x-intercept is 8, then the other will be the same distance on the other side of it. 8 is 5 from 3 where the axis of symmetry is. So 3-5 = -2. -2 will be the other intercept.