00:01
So using a graphing calculator, i use desmos on this one.
00:04
Basically, type it in, you're going to get a graph that looks roughly like this.
00:10
Okay? we're crossing at three points here.
00:13
Okay.
00:14
So i'm going to use this point here, which is at 4 .0.
00:17
I'm actually going to do this where i do synthetic division.
00:19
We're 4.
00:20
I put 1, negative 6, 3, and 20.
00:23
That's 1x cube, negative 6x squared, plus 3x, plus 20.
00:28
Running through my algorithm, i'm going to take 4 times 1 is 4.
00:30
Combine here to no negative 2.
00:32
I'm gonna go this way here.
00:34
4 times negative 2 is negative 8.
00:35
It combines to a negative 5...