Respuestas

2012-05-13T20:28:35+02:00

d = ((x_2- x_1)^2+(y_2- y_1)^2 )

la distancia es 5

5 = ((1-x_1 )^2 +(7-y_1 )^2 )

25 =(1-x_1 )^2 +(7-y_1 )^2

25 = 1 - 2x_1 + (x_1 )^2 + 49 -2y_1 + (y_1 )^2

0 = (x_1 )^2 + (y_1 )^2 2 (x_1+ y_1 ) + 25