For this case we have:
Be a function of the form ![y = f (x)](https://tex.z-dn.net/?f=y%20%3D%20f%20%28x%29)
Where:
![f (x) = \sqrt {x-5}](https://tex.z-dn.net/?f=f%20%28x%29%20%3D%20%5Csqrt%20%7Bx-5%7D)
If we want to find f (-2), we substitute
, then:
![f (-2) = \sqrt {-2-5}\\f (-2) = \sqrt {-7}](https://tex.z-dn.net/?f=f%20%28-2%29%20%3D%20%5Csqrt%20%7B-2-5%7D%5C%5Cf%20%28-2%29%20%3D%20%5Csqrt%20%7B-7%7D)
Since we have a negative root, the result will be given by complex numbers. By definition:
![\sqrt {-1} = i](https://tex.z-dn.net/?f=%5Csqrt%20%7B-1%7D%20%3D%20i)
So:
![f (-2) = \sqrt {7} i](https://tex.z-dn.net/?f=f%20%28-2%29%20%3D%20%5Csqrt%20%7B7%7D%20i)
Answer:
![f (-2) = \sqrt {7} i](https://tex.z-dn.net/?f=f%20%28-2%29%20%3D%20%5Csqrt%20%7B7%7D%20i)
Answer:
9 because 36 divided by 4 is 9
Step-by-step explanation:
I need points and i’m using this bc you didn’t even give an equation
It be 81.
You have to take half of -18 which is -9, and square that, which is 81.