00:03
Okay, we are going to do some factoring of polynomials, specifically trinomials, where a is not one.
00:14
So our problem here is 3x squared plus 2x minus 8.
00:25
And i'm going to use a simple way of doing this.
00:30
We call it slide and divide.
00:32
I'm going to take my 3, which is a.
00:34
I'm going to slide it over here to the negative 8, which is c.
00:39
So we're going to do a times c.
00:44
And that gives me x squared plus 2x minus 24.
00:53
So then i rewrote it, rewrite it.
01:02
And now i have just a 1 in front of the x.
01:08
So now i can look at c.
01:10
And find the factors of c that add up to b.
01:16
So i need factors of negative 24, 124.
01:27
Now since b is positive, it means the smaller of the two factors should be negative.
01:34
So negative 2, 12, negative 3, 8, negative 4, and 6...