Question

Find the distance between A and B. A(12,-1) B(0,-6)

Answer 1

`The\ distance\ between\ A(x_A;\ y_A)\ and\ B(x_B;\ y_B):\\\\d=√((x_B-x_A)^2+(y_B-y_A)^2)\\\\------------------------------\\\\A(12;-1);\ B(0;-6)\\\\subtitute\\\\d=√((0-12)^2+(-6-(-1))^2)=√((-12)^2+(-5)^2)\\\\=√(144+25)=√(169)=\boxed{13}`