 HOFFMAN ESTATES, Ill.--BUSINESS WIRE--CDK Global, Inc. Nasdaq: CDK, a leading retail automotive technology company, today completed the acquisition of Austin-based Square Root. Founded in 2006, Square Root is the creator of CoEFFICIENT, which helps automotive original equipment manufacturer OEM field managers understand and act on unique data patterns and opportunities for retailers in their markets. The acquisition of Square Root is another important step in our efforts to build innova 