0:00
All right.
00:01
What i would do in this problem is i know they give you all of these values is this is just a circle.
00:11
Well, what i would do is negate all of these because they don't tell me how to solve.
00:18
So 3x squared plus y squared is equal to 43.
00:23
But the reason why this will help me is i can then eliminate those 3x squared plus negative 1x squared is 2x squared.
00:31
And then 43.
00:33
Minus 25 will give me 18.
00:37
So then i can divide the two over, and then from here, x could be positive or negative three.
00:47
So we have a lot of situations because if x is three, going back up here, i'll switch to blue, well, three squared, whether you have three squared and negative three square, you'll get nine plus y squared is equal to 25.
01:03
So as i subtract the 9 over, i get 16.
01:08
And when i square root that, i get positive or negative 4.
01:11
So as far as what the answers are, we have four different answers.
01:18
We have 3, 4, both positive, or 3 negative 4.
01:23
We also have a situation where x is negative, but y is positive...