Question

calcule a distamcia entre os pontos A(6,4) e A(-3,-8)

Answer 1

$d^2=(bx-ax)^2+(by-ay)^2$
d=distancia
A(6,4)
B(-3,-8)

AB = B-A = (-3 -6) ; (-8-4) = (-9,-12)
AB = (-9,-12)
$d^2= (-9)^2+(-12^2)\\\\d^2=81+144\\\\d^2=225\\\\d= \sqrt{225}$

a distancia entre os dois pontos é $\sqrt{255}$