Tesla Plans $2 Billion Investment in Musk’s xAIPhotographer: David Paul Morris/BloombergTesla Inc. plans to invest about $2 billion into xAI, giving Elon Musk’s artificial-intelligence startup a cash infusion despite a shareholder vote last year that failed to win approval.The automaker entered into an agreement this month to acquire preferred shares as part of xAI’s latest funding round, Tesla said Wednesday in a statement with fourth-quarter results. The companies also entered into a “framewor...