问题标题:
-4a^2+1因式分解的结果应是()A.-(4a+1)(4a-1)B.-(2a-1)(2a-1)C.-(2a+1)(2a+1)D.-(2a+1)(2a-1)
问题描述:
-4a^2+1因式分解的结果应是()
A.-(4a+1)(4a-1)B.-(2a-1)(2a-1)C.-(2a+1)(2a+1)D.-(2a+1)(2a-1)
范斗回答:
原式
=1-4a²
=(1+2a)(1-2a)
=-(2a+1)(2a-1)
选择D
一刻永远523
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