二次根式的乘除(二)初三开学刚教高手进
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发布时间:2022-12-30 04:42
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热心网友
时间:2023-10-29 05:04
1. t/(t+1)-(t^2-1)/[(t+2)^2-1]乘以(t+3)/(t+1)
=t/(t+1)-(t+1)(t-1)/(t+2+1)(t+2-1)乘以t+3)/(t+1)
=t/(t+1)-1
=(t-t-1)/(t+1)
=-1/(t+1)
2. -(√-m^3)-[m√(-1/m)]
=-√-m(m^2)-√m^2(-1/m)
=-m√-m-√-m
=(-m-1)(-√-m)
=(m+1)√-m
(和您的结果完全一致)!