00:01
Okay, so let's find the intersection point of these two equations.
00:09
Okay.
00:10
So first i will make them as an equation set.
00:15
So i will solve them together.
00:18
I will call this equation number one.
00:21
This is equation number two.
00:23
Okay.
00:24
So let's plug equation number two back to equation number one.
00:29
So i have minus x plus two because x cubed.
00:33
Minus 4 times x, okay? let's solve this equation.
00:55
Plus 2 equals 0, okay? so i will rewrite this as x squared, x cubed minus 2x minus x minus 2 equals to 0, okay? and for the first two terms, we can factor out x times x minus 2 minus 2 0.
01:32
Okay, we can factor out x minus 2 and times x minus 1.
01:38
So x, sorry, here should be x squared.
01:44
Okay.
01:54
Okay, so then we cannot no longer use this.
01:57
Okay, so what we should do instead is we should, okay, we should try some some roots.
02:26
Okay, so for example, let's see, x equals 1...
