Determining the nature of turning points

Here we use the second derivative test to show whether a turning point is a maximum or minimum

[dhkdlhdyodyoclydtkd]

props to you for still responding to comments years later

[mohamedabdihakim]

What graphics tablet are you using? I wanted to purchase it for tutoring students on a stream

[memestar]

how did you diffrenciate it to -6? isn't it supposed to be just 6?