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

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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
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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
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

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
C
m²/(m-2)-m-2
=m²/(m-2)- (m+2)
= (m²-m²+4)/ (m-2)
= 4 / (m-2)

你题写错了?还是选项错了? 再仔细瞧瞧~
= [m²-(m-2)(m+2)] / (m-2)
=(m²-m²+4) / (m-2)
=4/ (m-2)
答案C

m(m-2)