00:01
I feel like they give away too much information for you in this problem.
00:06
Like, first of all, they tell you it's an ellipse.
00:10
You don't actually have to know it's an ellipse to get this answer correct is equal to one.
00:17
And when they tell you the center, so the center is located at 3 -9 -3.
00:24
I'm just kind of jot that down kind of lazily over here, 3 -9 -3.
00:30
I'm going to go ahead and put the x first.
00:33
I know some people, they'll wait to see which number is larger, but you don't have to because addition is commutative, so you can switch that order around.
00:41
But make sure that you write it squared, and then it's y minus the y coordinate.
00:45
Well, if you're subtracting negative 3, it will become plus 3 squared.
00:50
And then they tell you that the vertices are negative 7, negative 3.
00:56
So this way, let me put it a little bit a little bit further.
01:01
One vertex is at negative 7, negative 3, and the other one's way over here at 13 negative 3.
01:11
Now, you don't even need both of those to get the right answer because they give you the center.
01:15
You just need to know that the a value going from 13 to 3 is 10 units away, you know, 13 minus 3.
01:23
You could also do 3 minus negative 7.
01:26
Either way, you'll get a equals 10...