-(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab=
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-(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab=
![-(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab=](/uploads/image/z/18757241-17-1.jpg?t=-%28a%26sup2%3B-2ab%29%C3%979a%26sup2%3B-%289ab%26sup3%3B%2B12a%5E4b%26sup2%3B%29%C3%B73ab%3D)
-(a²-2ab)×9a²-(9ab³+12a^4b²)÷3ab
=-9a^4+18a³b-3b²-4a³b
=-9a^4+14a³b-3b²
=-9a^4+18a³b-3b²-4a³b
=-9a^4+14a³b-3b²
先化简再求值:(2ab²\a+b)³÷(ab²\a²-b²)²
3a-3b/10ab*25a²b³/a²-b² x²-4y²
3ab²+6a²b+3a³
若M=a³-3a²b+ab²,N=a³+1-2ab²,则2a³
2a²+ab=10,3b²-2ab=9,求4a²-4ab+9b²的值
化简(a²-2ab+2b²)-(2a²-2ab-3ab²)
因式分解8A³B²+6A³B²C-12AB³C
因式分解 1.a³+3a²b+3ab²+b³ 2.a³+6a²
先化解:(a² -b² /a² -ab ) /a² +2ab+b² /
(a²+ab)÷(a²-b²)=?2.已知a²-4a+9b²+6b+5
麻烦各位了.数学题(1)12a³b²-9a²+3ab(2)121x²-144y&
1.计算(-a²b²)÷(-ab²)×(-3ab³)2.先化简再求值「(x-y)