1. anonymous

2. anonymous

use the distance formula$d =\sqrt{(x2-x1)^2 + (y2-y1)^2}$

3. anonymous

are u sure that is the right formula to use ?

4. anonymous

x,1, y1 = -2, -4 and X2, y2 = 4, 3

5. anonymous

whats so with that logic i was right ?

6. anonymous

$d= \sqrt{4-(-2)^2+(3-(-4)^2)}$

7. anonymous

$d= \sqrt{4-(4) + (3-16)}$

8. anonymous

$d= \sqrt{0 -13}$

9. anonymous

This ends up as a complex number d= 13i

10. anonymous

have you studied complex numbers?

11. anonymous

naw lol i just really cant get this question wrong :p

12. anonymous

maybe I have made a mistake, its not in your four options

13. anonymous

but those are the only options i have it has to be there :(

14. anonymous

one second I will get someone else to look over my results, but I have doubled checked it, and there are no mistakes. @Thesmartone

15. anonymous

@Thesmarterone need you to check my results

16. anonymous

hes offfline

17. anonymous

@Black_ninja123 @triciaal

18. Black_ninja123

One sec let me check

19. Black_ninja123

B is correct

20. anonymous

What does B is correct mean?

21. Black_ninja123

22. anonymous

23. anonymous

yea can u prove it ?

24. Black_ninja123

$d=(A.B)=\sqrt{x2-x1^{2}+y2-y1^{2}}$ This is the formula

25. anonymous

wait @HelpOfTheGods

26. anonymous

ok yea i seen that formula in my lesson so im thinking thats prob right since i have 0 clue lol

27. Black_ninja123

$\sqrt{-2 - 4^{2}+-4-3^{2}}$

28. anonymous

@Black_ninja123 chose the points in reverse

29. Black_ninja123

$\sqrt{36+49}$

30. Black_ninja123

$\sqrt{85}$

31. Black_ninja123

Square root of 85 is 9.22

32. anonymous

was anything I did @Black_ninja123 incorrect?

33. Black_ninja123

you said -2^2 is 4 but its actually -4

34. anonymous

are you joking me? -2 x -2 = 4 not -4!

35. Black_ninja123

Use the calculator and its gonna tell you -4

36. anonymous

I appreciate your help on this one @Black_ninja123

37. anonymous

I entered (-2)x (-2) and it still gives me +4

38. Black_ninja123

enter -2^2

39. anonymous

still +4

40. Black_ninja123

ok

41. anonymous

I can change the rules of arithmetic for integers if you like