Question

Determine a distância entre os pontos A(1;4) e B(5;7)

Answer 1

$d = \sqrt{(x - x_{0})^{2} + (y - y_{0})^{2} }\\d = \sqrt{(1 - 5)^{2} + (4 - 7)^{2} }\\d = \sqrt{(-4)^{2} + (-3)^{2} }\\d = \sqrt{16+ 9 }\\d = \sqrt{25 }\\d = 5$