## anonymous 3 years ago Find the locus of a point P which moves so that (PA)^2 - (PB)^2=5

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1. hartnn

anything else is given ?? say P have co-ordinates (x,y). Then you may take, A or B as origin, and apply distance formula to get PA and PB....

2. anonymous

That is all that is given

3. anonymous

so how would you do this... im still not so sure

4. anonymous

hartnn mean that take P(x,y) n i think u r provided wid coordinates of A and B apply distance formula to get equation of locus of the point P

5. anonymous

ok thanks

6. hartnn

you know distance formula, right ? Distance between points (x1,y1) and (x2,y2) is $$\huge d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$$

7. anonymous

fr ur info differnce of distance between twp points is an hyperbola m i ryt hartnn?

8. hartnn

yes :)