字典翻译 问答 其它 (2014•长沙一模)化简2x2−1÷1x−1的结果是()A.2x−1B.2x2−1C.2x+1D.2x+2
问题标题:
(2014•长沙一模)化简2x2−1÷1x−1的结果是()A.2x−1B.2x2−1C.2x+1D.2x+2
问题描述:

(2014•长沙一模)化简2x2−1÷1x−1的结果是()

A.2x−1

B.2x2−1

C.2x+1

D.2x+2

秦士存回答:
  原式=2(x+1)(x−1)
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