Jackie and Alexa were working on homework together when Jackie said, “I got x = 5 as the solution, but it looks like you got something different. Which solution is right?”
“I think you made a mistake,” said Alexa. Did Jackie make a mistake? Help Jackie figure out whether she made a mistake and, if she did, explain her mistake and show her how to solve the equation correctly. Jackie’s work is shown at right. Homework Help ✎
Remember that (x + 4)2 = (x + 4)(x + 4) and (x − 1)2 = (x − 1)(x − 1).