College Algebra / Unit 6 Alg 327 short lesson, about 20 seconds
The Vertex Formula
Captions available
The idea
From general form, the vertex sits at h = −b/(2a) with k = f(h); the axis is that same x.
In practice
For x² − 4x + 3: h = 4/2 = 2 and k = f(2) = −1 — vertex (2, −1), no conversion needed.
Where people slip
Compute k by evaluating, never from c.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for College Algebra