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
3个回答
C
m²/(m-2)-m-2
=m²/(m-2)- (m+2)
= (m²-m²+4)/ (m-2)
= 4 / (m-2)
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