To find the extremum of the quadratic

15.Move the cursor to x = –1by pressing the or key.

16.Press to accept using F2(x) = (x + 3) 2 – 2 as the other boundary for the integral.

17.Choose the end value for x.

2

The cursor jumps to x = –2on the linear function.

18.Display the numerical value of the integral.

Note: See “Shading area” on page 3-11for another method of calculating area.

19.Move the cursor to the quadratic equation and find the extremum of the quadratic.

Select Extremum

The coordinates of the extremum are displayed at the bottom of the screen.

3-6

Function aplet