<p>A remark about number 2: many students are uncomfortable knowing when you get a larger or smaller answer. If you want to be cautious, you can simply try all 4 possibilities here, and then take the greatest answer.</p>
<p>A remark about number 2: many students are uncomfortable knowing when you get a larger or smaller answer. If you want to be cautious, you can simply try all 4 possibilities here, and then take the greatest answer.</p>