# Math Help - [SOLVED] y=a(x-h)(x-k) - i dont understand this formula

1. ## [SOLVED] y=a(x-h)(x-k) - i dont understand this formula

what does it mean and how does it work?

2. Are you sure it's not supposed to be $y=a(x-h)^2+k$

If so, then you're dealing with an equation for a parabola in its vertex form, with the vertex at point (h,k) - Note the change in sign of the x-coordinate.

3. Originally Posted by positiveion
what does it mean and how does it work?
This is the equation of a quadratic function with the zeros x = h or x = k.

The factor a forms the graph of this function (a parabola) depending of sign and value.