value of a - n + k?

[sanju09]

(3 x + 2) (2 x - 5) = a x² + k x + n.
What is the value of a - n + k?
A. 5
B. 8
C. 9
D. 10
E. 11

[spoiler]Source: majortests.com[/spoiler]

[selango]

ax^2+kx+n=6x^2-11x-10

a=6

k=-11

n=-10

a-n+k=6+10-11=5

Pick A

[rahul goyal]

ax^2+kx+n=6x^2-11x-10

a=6

k=-11

n=-10

a-n+k=6+10-11=5

Pick A

Thank you selango it is better way.

[likithae]

ax^2+kx+n=6x^2-11x-10

a=6

k=-11

n=-10

a-n+k=6+10-11=5

Pick A

i too agree with his approach ......... what is OA?