Solving x^2 equations

[aantthony]

When using the inverse (square root) we get a plus or minus. Should we use a ± operator, or build in support for arrays that would work like this?:

1+[2,3]+[3,4] = [3,4]+[3,4]=[6,8]

±x=[x,-x]

(the first value is the primary value which will be used if a function is required, like the .f for a graph object.)