Answer:
![-5\sqrt{7}](https://tex.z-dn.net/?f=-5%5Csqrt%7B7%7D)
Step-by-step explanation:
2√28 - 3√63
4√7 - 9√7
- 5√7
Answer:
I can help solve this problem, but where does N=-5 fit in this equation?
Here we are given the expression:
![x^{2}+18](https://tex.z-dn.net/?f=x%5E%7B2%7D%2B18)
Now let us equate it to zero to find x first,
![x^{2}+18=0](https://tex.z-dn.net/?f=x%5E%7B2%7D%2B18%3D0)
Now subtracting 18 from the other side,
![x^{2}=-18](https://tex.z-dn.net/?f=x%5E%7B2%7D%3D-18)
taking square root on both sides,
So we will get two values of x as ,
![x=3\sqrt{-2}](https://tex.z-dn.net/?f=x%3D3%5Csqrt%7B-2%7D)
![x=-3\sqrt{-2}](https://tex.z-dn.net/?f=x%3D-3%5Csqrt%7B-2%7D)
Now we can write square root -1 as i,
So our factors become,
![x=3i\sqrt{2}](https://tex.z-dn.net/?f=x%3D3i%5Csqrt%7B2%7D)
![x=-3i\sqrt{2}](https://tex.z-dn.net/?f=x%3D-3i%5Csqrt%7B2%7D)
Answer:
The final factored form becomes,
![(x+3i\sqrt{2})(x-3i\sqrt{2})](https://tex.z-dn.net/?f=%28x%2B3i%5Csqrt%7B2%7D%29%28x-3i%5Csqrt%7B2%7D%29)
Answer:
Draw a net of the polyhedron.
Calculate the area of each face.
Add up the area of all the faces.
Step-by-step explanation:
You already have to polyhedron drawn for you now you need to calculate the area of each face after you find that out just add them all together