Question

Determine a distância dos pontos A (2,-3) E B (5,0)

Answer 1

$d_{AB} = \sqrt{(x_A-x_B)^2+(y_A-y_B)^2}\\d_{AB} = \sqrt{(2 - 5)^2 + (-3 - 0)^2}\\d_{AB} = \sqrt{(-3)^2+(-3)^2}\\d_{AB} = \sqrt{9 + 9}\\d_{AB} = \sqrt{18}\\d_{AB} = 3\sqrt{2}$