When an executive order from the Trump administration shut down Broadcom's (NASDAQ: AVGO) attempt to buy chip-making peer Qualcomm (NASDAQ: QCOM), the company wasted no time finding other targets for its buyout ambitions. Just four months later, Broadcom is acquiring business software veteran CA Inc. (NASDAQ: CA) in an $18.9 billion all-cash deal.That's $44.50 per CA share, 19.6% above Wednesday's closing price.Here's what you need to know about Broadcom's new deal.Will this combination make sense?