问四道初一下册的数学题,能做对一道(要说清楚理由)就加分,会的来(1)、如果(x+q)*(x+1/5)的积中不含一次项,则q等于多少?(2)、长方形一边长3m+2n,另一边比它长m-n,则这个长方形的
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![问四道初一下册的数学题,能做对一道(要说清楚理由)就加分,会的来(1)、如果(x+q)*(x+1/5)的积中不含一次项,则q等于多少?(2)、长方形一边长3m+2n,另一边比它长m-n,则这个长方形的](/uploads/image/z/1774218-66-8.jpg?t=%E9%97%AE%E5%9B%9B%E9%81%93%E5%88%9D%E4%B8%80%E4%B8%8B%E5%86%8C%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E8%83%BD%E5%81%9A%E5%AF%B9%E4%B8%80%E9%81%93%EF%BC%88%E8%A6%81%E8%AF%B4%E6%B8%85%E6%A5%9A%E7%90%86%E7%94%B1%EF%BC%89%E5%B0%B1%E5%8A%A0%E5%88%86%2C%E4%BC%9A%E7%9A%84%E6%9D%A5%EF%BC%881%EF%BC%89%E3%80%81%E5%A6%82%E6%9E%9C%EF%BC%88x%2Bq%EF%BC%89%2A%EF%BC%88x%2B1%2F5%EF%BC%89%E7%9A%84%E7%A7%AF%E4%B8%AD%E4%B8%8D%E5%90%AB%E4%B8%80%E6%AC%A1%E9%A1%B9%2C%E5%88%99q%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%3F%EF%BC%882%EF%BC%89%E3%80%81%E9%95%BF%E6%96%B9%E5%BD%A2%E4%B8%80%E8%BE%B9%E9%95%BF3m%2B2n%2C%E5%8F%A6%E4%B8%80%E8%BE%B9%E6%AF%94%E5%AE%83%E9%95%BFm-n%2C%E5%88%99%E8%BF%99%E4%B8%AA%E9%95%BF%E6%96%B9%E5%BD%A2%E7%9A%84)
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