00:01
All right, so they give us a polynomial.
00:03
So they give us 4a plus b minus 12a squared minus 3ab.
00:13
They want to solve by grouping.
00:15
So our first step is going to actually be to group it.
00:18
Now you can group it in many different ways.
00:21
I'm going to just group it as it's given to me.
00:22
So i'm going to have 4a plus b.
00:26
And my second group, i'm going to have negative 12a squared minus 3ab.
00:32
Okay.
00:33
Now that we've done this, the second step is to pull out the gbcf.
00:38
So if i look at this first parentheses, okay, if i look at the number, so here's a four, and this technically is a what? this technically is a one.
00:50
Okay, so then what factor they have together? they have a one.
00:54
That's the only thing.
00:54
This is two and two and four in one, and then one at one.
00:58
So its factor is one.
01:00
Now, do they have the same variable? they don't, so i can't pull out an a or a b.
01:04
That's the only thing i can pull out.
01:06
So since i'm pulling out of one, everything is just going to say the same for this.
01:12
You could write this one or you don't have to...