The question did not get full credit because "the solution deals with only one case(reducible or irreducible). Your solution needs to work for all possible choices of a and b. Could someone please correct this for me:) thank you

roblem 3 2.2 D. [12 pts] Suppose that a and b are unspecified real numbers. Calculate 12 + ar + 6 2.3 Hint: Make sure to reflect carefully on Part C when you decide what needs to be done to perform the integration. 2.4 If your technique depends on a relationship between a and b, make sure to state what that relationship is. complete the square 2.5 dx = dy = x ray + b ( x + 9 ) + 6 - 42 (46- 8 3) M2 QUE WE ZY FA dus = arctanlu). 2x + 9 Pro arctan z arctan dys + C 3.1 cl 4 b 46- 42 3.2 42+Azz Atand 3.3 = A ArciAnd 3.4 relationship: A = 46