问题
下面【两点之间的距离】公式，正确的是哪个？设点 $A$ 的坐标为 $(x_{1}, y_{1})$, 点 $B$ 的坐标为 $(x_{2}, y_{2})$, $d_{AB}$ 表示 $A$ 和 $B$ 两点之间的距离.
选项
[A]. $d_{AB} =$ $\sqrt{(x_{1} + x_{2})^{2} – (y_{1} + y_{2})^{2}}$[B]. $d_{AB} =$ $\sqrt{(x_{1} – x_{2})^{2} – (y_{1} – y_{2})^{2}}$
[C]. $d_{AB} =$ $\sqrt{(x_{1} – x_{2})^{3} + (y_{1} – y_{2})^{3}}$
[D]. $d_{AB} =$ $\sqrt{(x_{1} – x_{2})^{2} + (y_{1} – y_{2})^{2}}$
$d_{AB} =$ $\sqrt{(x_{1} – x_{2})^{2} + (y_{1} – y_{2})^{2}}$