Respuesta :

[tex]d = \sqrt{ {(x2 - x1)}^{2} + {(y2 - y1)}^{2} } \\ d = \sqrt{( {2 - ( -1))}^{2} + {(9 - 5)}^{2} } \\ d = \sqrt{ {3}^{2} + {4}^{2} } \\ d = \sqrt{9 + 16} \\ d = \sqrt{25} = 5 \: answer[/tex]

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