00:01
We are asked to look at the expression of x squared plus 3x minus 39 and factor that.
00:10
So we need two integers whose product or multiplication is negative 39, but their sum is also positive of 3.
00:19
So when we factor, we find the factors negative 39, it's what times what would give us negative 39.
00:25
So we have negative 1 and positive 39, 1 and negative.
00:30
39, negative 3 and 13, oops, positive 3, negative 13.
00:41
And then we would also have to find the sums of each of these.
00:45
So negative 1, so negative 1 plus 39, positive 38, 1 plus negative 39, negative 38, negative 3 plus 13 is going to give us 10.
01:03
And then we would have 3 .3.
01:05
Plus negative 13, negative 10.
01:08
So we were trying to find the positive 3...