introduction to three dimensional geometry

Asked by gazalbhatnagar | 6th Nov, 2008, 11:11: AM

Expert Answer:

Let P(x,y,z)

Given PA +PB =10

i.e PA =  10 - PB

Squaring both sides ,

PA2 =  (10 - PB)2  =100 + PB2  - 20PB

(x-4)2  +  y 2  +  z = (x +4)2  + y2 + z 2   -20[  ((x +4)2  + y2 + z 2 )

simplifying , we get

4x + 25=5 [  ((x +4)2  + y2 + z 2 )

Square both sides again and simplify

 

Answered by  | 6th Nov, 2008, 11:53: AM

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