Yes, but -3^2 + 6 does not equal 55. The solution is not x = -3 or x = 7, the solution is just x = +-7. Further, the quadratic formula was applied incorrectly. The equation given isn't in the format ax^2 + bx + c = 0, and yet ChatGPT plugs in 6 as c. That's wrong, c should be -49. Based on that wrong use of the quadratic formula it concludes that there is no real solution and therefore that the solution is -3i and 7i. Which is wrong. Solving this equation doesn't even require the use of the quadratic formula. Subtract 6 from both sides, giving x^2 = 49, get the square root for x = +-7, simples.