(3x + 2) (2x - 7) = ax^2 + kx + n . What is the value of a - n + k ?
Choose the correct choice from the following answers:
A) 3
B) 8
C) 9
D) 10
E) 11

Rationale: expanding we have 6 x ^ 2 - 21 x + 4 x - 14 6 x ^ 2 - 17 x - 14 taking coefficients , a = 6 , k = - 17 , n = - 14 therefore a - n + k = 6 - ( - 14 ) - 17 = 20 - 17 = 3 the answer is a .
Answer: A