Find all positive integer values of c such that the equation x^2 - 11x + c = 0 only has roots that are real and rational. Express them in decreasing order, separated by commas.
Real and rational maeans the discriminant of this quadrtatic must be > 0
b^2 - 4ac >0
112 - 4 (1)(c) >0
c< 30.25 I 'll let you make the list 30,29,........1