Math IIC Question from Princeton Review

<p>I'm going over logarithms in the Princeton Review book and I came across a drill question I couldn't understand.</p>

<p>It says that log base 2 of x = log base 4 </p>

<p>and then in the answers section it says x^2. Could someone please explain this to me?</p>

<p>I had the same problem. I think it's a misprint, since it doesn't tell you what it's log base 4 of...</p>