The equation $x^2+ ax = -14$ has only integer solutions for $x$. If $a$ is a positive integer, what is the greatest possible value of $a$?
Question:
The equation $x^2+ ax = -14$ has only integer solutions for $x$. If $a$ is a positive integer, what is the greatest possible value of $a$?
Answer:
Let's think step by step.

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The equation $x^2+ ax = -14$ has only integer solutions for $x$. If $a$ is a positive integer, what is the greatest possible value of $a$?
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