00:01
Okay, let's take a look at this area problem where we have a building one floor and we're given its total square footage, which is the total area, of 1632 square feet.
00:22
And we're also given that its length is 14 feet longer than its width.
00:30
So its width is w, and then that means its length is 14 feet longer, so w plus 14.
00:40
So this together, if we multiplied these, then we can come up with an equation to help us find like what the actual lengths are.
00:50
So the area in terms of w is equal to w times w plus 14, that this length, length times width.
01:06
Now to show this as a quadratic, go ahead and just multiply it out.
01:10
We get w squared plus 14 w and we actually because we know what the area is, we can insert that as well, and then solve for w.
01:25
So subtract 16, 1 ,632 on both sides.
01:29
We get w squared plus 14w minus 1 ,632.
01:37
Now you can factor this a lot of different ways.
01:40
I'm just going to use two binomials because it's a pretty nice factoring.
01:47
We get w and w because w times w is w squared.
01:52
And then we know we're going to have one positive and one negative because we have a negative as our c term, negative 16 -132...