HP 40G manual Find the greater of the two roots of the quadratic function, SelectRoot

To find the greater of the two roots of the quadratic function

To find the intersection of the two functions

10.Find the greater of the two roots of the quadratic function.

Note: Move the cursor to the graph of the quadratic equation by pressing the *k,￿or *e,￿key. Then move the cursor so that it is near x = – 1 by pressing the *A,￿or￿

*>,)&1a￿￿key.

2.Select￿Root￿

The root value is displayed at the bottom of the screen.

11.0(18aFind the￿)&1aintersection of the two functions.

*e,￿2.a￿

12.Choose the linear function whose intersection with the

2quadratic.a function you wish to find.

The coordinates of the intersection point are displayed at the bottom of the screen.

Note: If there is more than one intersection (as

in our example), the coordinates of the intersection point closest to the current cursor position are displayed.

3-4 Function aplet