Scaned image problems

how i can take out that texture (usualy from books or magazines) on scaned images???

You hopefully have a decent enough scanner to have a "Descreen" function. If not, and this is important, go buy one. When you choose File: Import... to get to your scanner's Plug-In, you're technically no longer in Photoshop, but instead you're using the software that came with your scanner. Search through the menus and buttons for something like "descreen". That should help.
If none of the above is an option, once you've got the image open in Photoshop, try Filter:Noise: Despeckle or Filter: Blur: Gaussian Blur (or both) and see if they help reduce the scanned dot-pattern.

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