1.0 link Rainbow Dash Network http://rainbowdash.net/ The white void (hakupony) http://rainbowdash.net/hakupony http://rainbowdash.net/notice/1322375 @<span class="vcard"><a href="http://rainbowdash.net/user/7517" class="url" title="Sindre"><span class="fn nickname">derpyshy</span></a></span> Let's see, you can solve the first bracket easily. x-4x is -3x. Now multiply it with x and you get -3x². The next step is easy. 5x²-3x²=2x²