Question

Find the distance between the points (1, 3) and (-7, 2).

Answer 1

`A(x_1;\ y_1);\ B(x_2;\ y_2)\\\\the\ distance\ between\ A\ and\ B:\\\\d=√((x_2-x_1)^2+(y_2-y_1)^2)\\-------------------------\\\\A(1;\ 3);\ B(-7;\ 2)\\\\d=√((-7-1)^2+(2-3)^2)=√((-8)^2+(-1)^2)=√(64+1)\\\\=\boxed{√(65)}`