计算(9m²/-3m-n)+(n²/n+3m)
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/01 07:18:28
![计算(9m²/-3m-n)+(n²/n+3m)](/uploads/image/z/1377517-13-7.jpg?t=%E8%AE%A1%E7%AE%97%289m%26%23178%3B%2F-3m-n%29%2B%28n%26%23178%3B%2Fn%2B3m%29)
xK
0"R](^ADA|c.\j]KMu+U3_fߋa/+5fو%H$ZE%ޤF]0
UTId*L!78%Z\z:Q0.oex| N(]AWj{z_Sɔf^-eX$x2{R(}JK%T-xdbJ 4UI
计算(9m²/-3m-n)+(n²/n+3m)
计算(9m²/-3m-n)+(n²/n+3m)
计算(9m²/-3m-n)+(n²/n+3m)
原式=-9m²/(3m+n)+n²/(3m+n)
=-(9m²-n8)/(3m+n)
=-(3m+n)(3m-n)/(3m+n)
=-(3m-n)
=n-3m
我估计你的试子写错了,应该是:9m²/(-3m-n)+n²/(n+3m)
9m²/(-3m-n)+n²/(n+3m)
=n²/(n+3m)-9m²/(3m+n)
=(n²-9m²)/(3m+n)
=(n+3m)(n-3m)/(3m+n)
=n-3m
9m^2/(-3m-n)+n^2/(n+3m)
=(n^2-9m^2)/(n+3m)
=(n+3m)(n-3m)/(n+3m)
=n-3m