(3x + 4) (2x - 5) = ax^2 + kx + n . What is the value of a - n + k ?  Answers
A) 5  B) 8  C) 9  D) 10  E) 15
15xpanding we have 6x^2 -15x + 8x -20   6x^2 - 7x - 20   Taking coefficients, a = 6, k= -7, n = -20   Therefore a - n + k = 6 - (-20) - 11 = 26 - 11= 
<gadget id="calculator">26 - 11</gadget>
<output>15</output>
15   The answer is 15.
<result>E</result>
(3x + 4) (2x - 5) = ax^2 + kx + n . What is the value of a - n + k ?