Respuesta :

Answer:

[tex]\sqrt{10}[/tex]

Step-by-step explanation:

Answer:

Step-by-step explanation:

note : distance between A(X1,Y1) an B (X2,Y2) is :  

AB= √((X2 - X1)² + (Y2 - Y1)²)

in this exercice : X1 = 2   X2 = - 1   Y1 = 8    Y2 = 9   continu .....calculate AB