Respuesta :
D = √[(x1
- x2)^2 + (y1 - y2)^2]
13 = √[(6 - 1)^2 + (7 - A)^2]
13 = √25 + (7 - A)^2]
169 = 25 + ( 7-A)^2
169 = 25 +49 -14A+A^2
A^2-14A-95 = 0
A= -(-14)±√(141²+380)
------------------------------- = 19
2*1
13 = √[(6 - 1)^2 + (7 - A)^2]
13 = √25 + (7 - A)^2]
169 = 25 + ( 7-A)^2
169 = 25 +49 -14A+A^2
A^2-14A-95 = 0
A= -(-14)±√(141²+380)
------------------------------- = 19
2*1