First we need to find out what [tex]407^2 [/tex] and [tex]-68^2[/tex] is.
[tex]407^2 = 165649[/tex]
[tex]-68^2 = -4624[/tex]
Then we subtract -4624 from 165649 to find the distance between the two.
[tex]165649-(-4624) = 170273[/tex]
So, the distance between [tex]407^2 [/tex] and [tex]-68^2[/tex] is 170273.