(3x + 2) (2x - 3) = ax^2 + kx + n . What is the value of a - n + k ?  Options: A) 5 B) 7 C) 9 D) 10 E) 11

Rationale: "expanding we have 6 x ^ 2 - 9 x + 4 x - 6 6 x ^ 2 - 5 x - 6 taking coefficients , a = 6 , k = - 5 , n = - 6 therefore a - n + k = 6 - ( - 6 ) - 5 = 12 - 5 = 7 the answer is b ."
Answer: B