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初二数学题(就一道选择题)
化简m²-(m-2)-m-2的结果是
A:m²/(m-2)
B:(m²-2)/(m-2)
C:4/(m-2)
D:4
请求大家帮帮我!谢谢了!
打错了,化简的是
m²/(m-2)-m-2
人气:440 ℃ 时间:2020-03-23 20:02:34
解答
C
m²/(m-2)-m-2
=m²/(m-2)- (m+2)
= (m²-m²+4)/ (m-2)
= 4 / (m-2)
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