$<br />\frac{x-2}{x-5}&gt;3<br />$
$<br />\Rightarrow (x-2)(x-5)&gt;3(x-5)^2<br />$
$<br />\Rightarrow (x-5){(x-2)-3(x-5)}&gt;0<br />$
Can someone tell me wtf happened to the square? And why it's ok to do that?
$<br />\Rightarrow (x-5)(13-2x)&gt;0<br />$