现有三个多项式:1/2a²+a-4,1/2a²+5a+4,1/2a²-a,请你选择中两个进行加法或减法的运算.(1)使结果不含常数项(2)使结果不含二次项
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![现有三个多项式:1/2a²+a-4,1/2a²+5a+4,1/2a²-a,请你选择中两个进行加法或减法的运算.(1)使结果不含常数项(2)使结果不含二次项](/uploads/image/z/2754288-0-8.jpg?t=%E7%8E%B0%E6%9C%89%E4%B8%89%E4%B8%AA%E5%A4%9A%E9%A1%B9%E5%BC%8F%3A1%2F2a%26%23178%3B%2Ba-4%2C1%2F2a%26%23178%3B%2B5a%2B4%2C1%2F2a%26%23178%3B-a%2C%E8%AF%B7%E4%BD%A0%E9%80%89%E6%8B%A9%E4%B8%AD%E4%B8%A4%E4%B8%AA%E8%BF%9B%E8%A1%8C%E5%8A%A0%E6%B3%95%E6%88%96%E5%87%8F%E6%B3%95%E7%9A%84%E8%BF%90%E7%AE%97.%281%29%E4%BD%BF%E7%BB%93%E6%9E%9C%E4%B8%8D%E5%90%AB%E5%B8%B8%E6%95%B0%E9%A1%B9%282%29%E4%BD%BF%E7%BB%93%E6%9E%9C%E4%B8%8D%E5%90%AB%E4%BA%8C%E6%AC%A1%E9%A1%B9)
现有三个多项式:1/2a²+a-4,1/2a²+5a+4,1/2a²-a,请你选择中两个进行加法或减法的运算.(1)使结果不含常数项(2)使结果不含二次项
现有三个多项式:1/2a²+a-4,1/2a²+5a+4,1/2a²-a,请你选择中两个进行加法或减法的运算.
(1)使结果不含常数项
(2)使结果不含二次项
现有三个多项式:1/2a²+a-4,1/2a²+5a+4,1/2a²-a,请你选择中两个进行加法或减法的运算.(1)使结果不含常数项(2)使结果不含二次项
(1)使结果不含常数项
(1/2a²+a-4)+(1/2a²+5a+4)
=1/2a²+a-4+1/2a²+5a+4
=a²+6a
(2)使结果不含二次项
(1/2a²+5a+4)-(1/2a²-a)
=1/2a²+5a+4-1/2a²+a
=6a+4