00:01
So this question asks us to factor the expression x squared plus 4x minus 5.
00:06
And this will be in terms of a single product of two terms.
00:11
So there's no real good way to solve these.
00:13
It's mostly trial and error.
00:15
However, there's a couple things you can do.
00:17
We know that our first term is x squared.
00:20
So in both of our parentheses, we're going to need to have an x.
00:29
So we need x in both of these.
00:32
Now we can see that our second term is positive, but our third term is negative.
00:38
So this negative 5 comes from the multiplication of the second number in both of these parentheses, whatever it is.
00:47
And this 4x comes from the addition of those terms.
00:50
So we know that since we're multiplying, it means that one of the terms must be positive and one of the terms must be negative...