Get ID of latest 2 posts from specific Category

How do I do this? I’ve been looking around for a few hours and I finally found a way to display the latest post from a specific category:

<?php $postslist = get_posts(‘cat=3&numberposts=1&p=’.$posts[2]->ID); ?>
<?php foreach ($postslist as $post) : setup_postdata($post); ?>

The code above display the latest post.

How do I make it display the post before that?