Question

calcule a distancia do ponto A(7,11) e B(-13,-4)

Answer 1

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$D_{AB}}= \sqrt{(x_B-x_A)^2+(y_B-y_A)^2} \\ \\ D_{AB}= \sqrt{(-11-7)^2+(-4-11)^2} \\ \\ D_{AB}= \sqrt{(-20)^2+(-15)^2} \\ \\ D_{AB}= \sqrt{400+225} \\ \\ D_{AB}= \sqrt{625} \\ \\ D_{AB}=25$