作业帮看看下面的式子怎么化简,①3a²b-2[ab²-2(a²b-2ab²)]②（3a-2b）+(5a-7b)-2(2a-4b)③(-x²+2xy-y²)-2(xy-3x²)+3(2y²-xy)④3x²yz+{xyz²-[3x²yz(4xy²z+1/2xyz)]}
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/18 19:10:37
![看看下面的式子怎么化简,①3a²b-2[ab²-2(a²b-2ab²)]②（3a-2b）+(5a-7b)-2(2a-4b)③(-x²+2xy-y²)-2(xy-3x²)+3(2y²-xy)④3x²yz+{xyz²-[3x²yz(4xy²z+1/2xyz)]}](/uploads/image/z/5435796-12-6.jpg?t=%E7%9C%8B%E7%9C%8B%E4%B8%8B%E9%9D%A2%E7%9A%84%E5%BC%8F%E5%AD%90%E6%80%8E%E4%B9%88%E5%8C%96%E7%AE%80%2C%E2%91%A03a%26%23178%3Bb-2%5Bab%26%23178%3B-2%28a%26%23178%3Bb-2ab%26%23178%3B%29%5D%E2%91%A1%EF%BC%883a-2b%EF%BC%89%2B%285a-7b%29-2%282a-4b%29%E2%91%A2%28-x%26%23178%3B%2B2xy-y%26%23178%3B%29-2%28xy-3x%26%23178%3B%29%2B3%282y%26%23178%3B-xy%29%E2%91%A33x%26%23178%3Byz%2B%7Bxyz%26%23178%3B-%5B3x%26%23178%3Byz%284xy%26%23178%3Bz%2B1%2F2xyz%29%5D%7D)
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看看下面的式子怎么化简,①3a²b-2[ab²-2(a²b-2ab²)]②（3a-2b）+(5a-7b)-2(2a-4b)③(-x²+2xy-y²)-2(xy-3x²)+3(2y²-xy)④3x²yz+{xyz²-[3x²yz(4xy²z+1/2xyz)]}
看看下面的式子怎么化简,
①3a²b-2[ab²-2(a²b-2ab²)]
②（3a-2b）+(5a-7b)-2(2a-4b)
③(-x²+2xy-y²)-2(xy-3x²)+3(2y²-xy)
④3x²yz+{xyz²-[3x²yz(4xy²z+1/2xyz)]}
看看下面的式子怎么化简,①3a²b-2[ab²-2(a²b-2ab²)]②（3a-2b）+(5a-7b)-2(2a-4b)③(-x²+2xy-y²)-2(xy-3x²)+3(2y²-xy)④3x²yz+{xyz²-[3x²yz(4xy²z+1/2xyz)]}
其实很煎蛋！先算小括号里面的，再算大括号里面的