let:
[tex] P_{1}=(12,-3) [/tex]
[tex] P_{2}=(2,3) [/tex]
[tex] P_{3}=(-3,6) [/tex]
Solution:
distance from [tex] P_{1}[/tex] to [tex] P_{2}[/tex] to [tex] P_{3}[/tex]
[tex]d= \sqrt{(2-12)^2 + (3-(-3))^2} + \sqrt{(-3+2)^2+(6-3)^2} [/tex]
[tex]d=14.824[/tex]
