Claude argued with me about the quadratic equation the other day. It vehemently felt a -c was required whereas a c was the correct answer. I pointed this out

Claude argued with me about the quadratic equation the other day. It vehemently felt a -c was required whereas a c was the correct answer. I pointed this out showing step by step and it finally agreed. I tried Grok to see if it could get it right. Nope, the exact same response as Claude, but Grok never backed down; even after the step by step explanation of the maths.