Answer:
189
Step-by-step explanation:
If you mean this, my answer is 3x63= 189
![{x}^{2} + {y}^{2} = 57 \\ xy = 3](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%20%20%7By%7D%5E%7B2%7D%20%20%3D%2057%20%5C%5C%20xy%20%3D%203)
![{x}^{2} + {y}^{2} + 2xy = 57 + 2 \times 3](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%20%20%7By%7D%5E%7B2%7D%20%20%2B%202xy%20%3D%2057%20%2B%202%20%5Ctimes%203)
![{(x + y)}^{2} = 63](https://tex.z-dn.net/?f=%20%7B%28x%20%2B%20y%29%7D%5E%7B2%7D%20%20%3D%2063)
![3 {(x + y)}^{2} = 3 \times 63 = 189](https://tex.z-dn.net/?f=3%20%7B%28x%20%2B%20y%29%7D%5E%7B2%7D%20%20%3D%203%20%5Ctimes%2063%20%3D%20189)
9514 1404 393
Answer:
r = ±√47
Step-by-step explanation:
-7r^2 = -329 . . . . given
r^2 = 47 . . . . . divide both sides by -7 (multiplication property of equality)
r = ±√47 . . . . square root both sides (square root property of equality)
It is just a dark screen. Upload it again?