SOLUTION: find the distance bewteen the points using the distance formula: 1) (5,-8), (0,0) 2) (a,b) (-a,-b) please explain how to do it and how u got ur answer!! thanks :)

Algebra ->  Formulas -> SOLUTION: find the distance bewteen the points using the distance formula: 1) (5,-8), (0,0) 2) (a,b) (-a,-b) please explain how to do it and how u got ur answer!! thanks :)      Log On


   

Question 473073: find the distance bewteen the points using the distance formula:
1) (5,-8), (0,0)
2) (a,b) (-a,-b)
please explain how to do it and how u got ur answer!!
thanks :)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Note: D = sqrt+%28%28x%5B1%5D-x%5B2%5D%29%5E2%2B%28y%5B1%5D-y%5B2%5D%29%5E2%29%29

1) (5,-8), 

   (0,0)    D =sqrt%28+%285-0%29%5E2+%2B+%28-8-0%29%5E2%29+=+sqrt%2889%29



2) (a,b)  

  (-a,-b)   D =sqrt%28+%28a%2Ba%29%5E2+%2B+%28b%2Bb%29%5E2%29+=+sqrt%284a%5E2+%2B+4b%5E2%29