Question 308915
1 and 21 becomes 1+441=442
0 and 20 becomes 400
-10 and 10 becomes 200 has to be -10 and 10
because they are 20 from each other and the 9 and -11 is 202, so 200 is the minimum sum
{{{(10)-20=(-10)}}} and {{{10^2+(-10)^2=200}}}
{{{highlight(10)}}}and{{{highlight(-10)}}}