[tex]A = (-1, 1), \ \ \ \ B = (3,-2)\\A = (x_{A}, y_{A}), \ \ B = (x_{B},y_{B})\\\\|AB| = \sqrt{(x_{B}-x_{A})^{2}+(y_{B}-y_{A})^{2}}\\\\|AB| = \sqrt{(3-(-1))^{2}+(-2-1)^{2}}} = \sqrt{4^{2}+(-3)^{2} } = \sqrt{16+9} = \sqrt{25} = 5\\\\Odp. \ B. \ 5[/tex]
