Draw lines to divide the circle into 4 equal parts

Complete the square to determine the minimum or maximum value of the function defined by the expression. x2 − 12x − 2 a) maximum value at 38 b) minimum value at 38 c) maximum value at −38 d) minimum value at −38

Could someone with number 1 and 2

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error