00:01
Okay, so we ask the factor to follow.
00:03
Let's start by factoring out of negative, 3, and then x squared.
00:07
So we get x -2 -5x, and then minus 5x, and then minus 3.
00:16
Okay.
00:19
Now, let's use our grouping method to factor.
00:22
We have a is equal to 1, b is equal to negative 5, and c is equal to negative 3.
00:27
Our key number is equal to negative 3.
00:30
So the product of two numbers should be equal to negative 3, and there's sum should be equal to negative 5.
00:57
Okay? so we'll see that we can use 3 and 1, but our sum is not equal to negative 5, and it's not attainable.
01:05
So this is not factorable.
01:13
No, actually, when we factor out from our first coefficient, we actually have a 2.
01:20
So our is actually 2.
01:22
So that means our key number is actually 2 times negative 3, which is negative 6.
01:28
So this gives us negative 6 here.
01:31
So we can have 3 and 2 and negative 2...