anonymous
  • anonymous
please help meeeee !!!! medal and fan <3
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
use the distance formula\[d =\sqrt{(x2-x1)^2 + (y2-y1)^2}\]
anonymous
  • anonymous
are u sure that is the right formula to use ?

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anonymous
  • anonymous
x,1, y1 = -2, -4 and X2, y2 = 4, 3
anonymous
  • anonymous
whats so with that logic i was right ?
anonymous
  • anonymous
\[d= \sqrt{4-(-2)^2+(3-(-4)^2)}\]
anonymous
  • anonymous
\[d= \sqrt{4-(4) + (3-16)}\]
anonymous
  • anonymous
\[d= \sqrt{0 -13}\]
anonymous
  • anonymous
This ends up as a complex number d= 13i
anonymous
  • anonymous
have you studied complex numbers?
anonymous
  • anonymous
naw lol i just really cant get this question wrong :p
anonymous
  • anonymous
maybe I have made a mistake, its not in your four options
anonymous
  • anonymous
but those are the only options i have it has to be there :(
anonymous
  • 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
anonymous
  • anonymous
@Thesmarterone need you to check my results
anonymous
  • anonymous
hes offfline
anonymous
  • anonymous
Black_ninja123
  • Black_ninja123
One sec let me check
Black_ninja123
  • Black_ninja123
B is correct
anonymous
  • anonymous
What does B is correct mean?
Black_ninja123
  • Black_ninja123
B is the right answer
anonymous
  • anonymous
Solution please
anonymous
  • anonymous
yea can u prove it ?
Black_ninja123
  • Black_ninja123
\[d=(A.B)=\sqrt{x2-x1^{2}+y2-y1^{2}}\] This is the formula
anonymous
  • anonymous
anonymous
  • anonymous
ok yea i seen that formula in my lesson so im thinking thats prob right since i have 0 clue lol
Black_ninja123
  • Black_ninja123
\[\sqrt{-2 - 4^{2}+-4-3^{2}}\]
anonymous
  • anonymous
@Black_ninja123 chose the points in reverse
Black_ninja123
  • Black_ninja123
\[\sqrt{36+49}\]
Black_ninja123
  • Black_ninja123
\[\sqrt{85}\]
Black_ninja123
  • Black_ninja123
Square root of 85 is 9.22
anonymous
  • anonymous
was anything I did @Black_ninja123 incorrect?
Black_ninja123
  • Black_ninja123
you said -2^2 is 4 but its actually -4
anonymous
  • anonymous
are you joking me? -2 x -2 = 4 not -4!
Black_ninja123
  • Black_ninja123
Use the calculator and its gonna tell you -4
anonymous
  • anonymous
I appreciate your help on this one @Black_ninja123
anonymous
  • anonymous
I entered (-2)x (-2) and it still gives me +4
Black_ninja123
  • Black_ninja123
enter -2^2
anonymous
  • anonymous
still +4
Black_ninja123
  • Black_ninja123
ok
anonymous
  • anonymous
I can change the rules of arithmetic for integers if you like

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