<p>Page 182 of Princeton Review's 2012 Cracking the SAT. Their page long example to illustrate factoring quadratics is this:</p>

<ol>

<li>In the expression x^2 + kx + 12, k is an integer and k <0. Which of the following is a possible value of k?

A) -13<br>

B) -12<br>

C) -6<br>

D) 7<br>

E) It cannot be determined from the information given</li>

</ol>

<p>They then go into a long winded explanation of why the answer is A.</p>

<p>Uh, excuse me??? Why can't k be any negative integer? The answer is E.</p>

<p>I think they meant to say "In the **equation** x^2 + kx + 12 **= 0**, k **and x** are integers...". </p>

<p>Am I missing something obvious here? Did the PR ask ANYBODY mathematically inclined to review for errors???</p>