在代数中，展开括号的意思是去掉括号。在这个视频中，我们将解释如何展开单括号2(3x - 4)，在另一个视频中，我们将讲解如何展开双括号(x - 5)(x + 3)。 点击这里查看更多视频：https://alugha.com/FuseSchool 请访问我们的网站：www.fuseschool.org，我们所有的视频都是按主题和特定顺序仔细分类，并查看我们还能提供什么。评论、点赞并与同学分享。你可以提问和回答问题，老师会回答你。 这些视频可以用于翻转课堂模式，也可以作为复习辅助工具。 Twitter：https://twitter.com/fuseSchool 在FuseSchool平台和应用中获得更深层次的学习体验：www.fuseschool.org。 本开放教育资源是免费的，采用知识共享许可证。署名-非商业性 CC BY-NC ( 查看许可证契约: http://creativecommons.org/licenses/by-nc/4.0/ )。 你可以下载该视频用于非营利性的教育用途。如果你想修改视频，请联系我们：info@fuseschool.org。
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Interest is the amount charged by a lender to a borrower. It means that if you borrow some money from a bank, you have to pay back more than the money you borrowed. Equally, if you have a savings account and deposit some money, the bank will pay you interest as a sort of thank you for saving with th
In this video we are going to look at a few different ways in which plant hormones can be used. Plant growth hormones (auxins) can be used as selective weedkillers. The selective weedkillers contain growth hormones, that cause the weeds to grow really quickly. This means the weed is absorbing nutr
Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In this video we look at how to simplify algebraic fractions, and how to add and subtract them. VISIT us at www.fuseschool.org, wh
