已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|
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已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|已知-3<m<2.化简|m-2|+|m+3|-|3m+9
已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|
已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|
已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|
|m-2|+|m+3|-|3m+9|-|2m-4|
=(2-m)+(m+3)-(3m+9)-(4-2m)
=2-m+m+3-3m-9-4+2m
=-m-8
-3<m<2
|m-2|+|m+3|-|3m+9|-|2m-4|
=|m-2|+|m+3|-3|m+3|-2|m-2|
=2-m+m+3-3(m+3)-2(2-m)
=5-3m-9-4+2m
=-8-m
|m-2|+|m+3|-|3m+9|-|2m-4|
=2-m+m+3-3m-9-4+2m
=-m-8
原式=2-m+m+3-3m-9-4+2m=-8+2m
已知-3<m<2.化简|m-2|+|m+3|-|3m+9|-|2m-4|
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