Answer:
Option A is the correct answer
A. ![(x+2\sqrt3 i)(x-2\sqrt3 i)](https://tex.z-dn.net/?f=%28x%2B2%5Csqrt3%20i%29%28x-2%5Csqrt3%20i%29)
Step-by-step explanation:
![(x + 2 \sqrt{3} i)(x - 2 \sqrt{3} i) \\ \\ = {(x)}^{2} - (2 \sqrt{3} i)^{2} \\ \\ = {x}^{2} - {(2)}^{2} {( \sqrt{3} )}^{2} {i}^{2} \\ \\ = {x}^{2} -12 {i}^{2} \\ \\ = {x}^{2} - 12( - 1) \\ (\because i^2=-1) \\ = {x}^{2} + 12](https://tex.z-dn.net/?f=%28x%20%2B%202%20%5Csqrt%7B3%7D%20i%29%28x%20%20-%20%202%20%5Csqrt%7B3%7D%20i%29%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7B%28x%29%7D%5E%7B2%7D%20%20-%20%282%20%5Csqrt%7B3%7D%20i%29%5E%7B2%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20-%20%20%7B%282%29%7D%5E%7B2%7D%20%20%7B%28%20%5Csqrt%7B3%7D%20%29%7D%5E%7B2%7D%20%20%7Bi%7D%5E%7B2%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20-12%20%7Bi%7D%5E%7B2%7D%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20-%2012%28%20-%201%29%20%5C%5C%20%28%5Cbecause%20i%5E2%3D-1%29%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20%2B%2012)
Answer:
The centre's coordinates are: (5; -1)
Radius is the square of 9:
![\sqrt{9} = 3 \: and \: - 3 \\ it \: has \: to \: be \: positive \: therefore \: it \: is 3](https://tex.z-dn.net/?f=%20%5Csqrt%7B9%7D%20%20%3D%203%20%5C%3A%20and%20%5C%3A%20%20-%203%20%5C%5C%20it%20%20%5C%3A%20has%20%5C%3A%20to%20%5C%3A%20be%20%5C%3A%20positive%20%5C%3A%20therefore%20%5C%3A%20it%20%5C%3A%20is%20%203)
Answer: Radius=3; the cente's coordinates are(5; -1)
Good luck!
Intelligent Muslim,
From Uzbekistan.
1 kg is equal to a little over twice the lbs. So if you have 75 kg it'll be over 150 lbs. Therefore 75 kg weighs more.
Answer:
Hello! answer: x = 1
Step-by-step explanation:
This triangle will add up to 180 degrees 85 + 64 = 149 180 - 149 = 31 4 × 1 = 4 4 + 27 = 31 therefore x = 1 Hope that helps!