1. The problem statement, all variables and given/known data Use the ε-δ definition of limits to prove that limx→2 x2 = 4. 3. The attempt at a solution |x2 - 4| < ε 0 < |x - 2| < δ |x - 2| |x + 2| < ε And that's where I get stuck, can I divide both sides by |x + 2| to yield |x - 2| < ε/|x + 2| = δ In which case, where do I go from there? Can I input 2 to get ε/4 = δ?