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value of a - n + k?

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value of a - n + k?

by sanju09 » Sat Jul 24, 2010 2:04 am
(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

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by selango » Sat Jul 24, 2010 2:09 am
ax^2+kx+n=6x^2-11x-10

a=6

k=-11

n=-10

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

Pick A
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by rahul goyal » Tue Aug 10, 2010 2:06 am
selango wrote: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.
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by likithae » Tue Aug 10, 2010 2:10 am
selango wrote: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?
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