Identifying unknowns

If we are given a mixed broth tube with 2 unknowns, how will you isolate it?  How will you know when it's isolated?

Is it fair to say, that "Using sterile technique, I would preform the streak plate method.  Once I can see, the 2 separate colonies in quadrant 4 of streak plate, I would put one of each colony into their own agar slant tube.  I would know that they are isolated because you'll be able to see the difference on the streak plate but could also confirm through staining such as a gram stain.