I downloaded Qt SDK file (530 MB and file is ok) qt-sdk-linux-x86-opensource-2010.05.1.bin. I typed in the console (slackware), like in the manual for installation at the site:
chmod u+x qt-sdk-linux-x86-opensource-2010.05.1.bin
But when I type the second command for installation:
./qt-sdk-linux-x86-opensource-2010.05.1.bin
I get an error message:
bash: ./qt-sdk-linux-x86_64-opensource-2010.05.1.bin: cannot execute binary file
How to install?

fileagainst it says...? – Ignacio Vazquez-Abrams Dec 18 '10 at 14:35