In the equation x^2+kx+12 , k is a negative integer. Which of the following is a possible value of k?
A. -13
B. -12
C. -6
D. 7
E. It cannot be determined from the information given…
This is a question from princeton book.. The answer is A ..
Please explain me..
Thanx in advance..
Think about negative factors of 12. To have a negative number in the middle of that quadratic and then positive 12, the factored quadratic will look like (x – something)(x – something).
Ah yes, there it is. 🙂
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