(-3ab)(a^2b-3ab^2+1)
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(-3ab)(a^2b-3ab^2+1)(-3ab)(a^2b-3ab^2+1)(-3ab)(a^2b-3ab^2+1)解(-3ab)(a²b-3ab²+1)=-3a³b
(-3ab)(a^2b-3ab^2+1)
(-3ab)(a^2b-3ab^2+1)
(-3ab)(a^2b-3ab^2+1)
解
(-3ab)(a²b-3ab²+1)
=-3a³b²+9a²b³-3ab
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
ab^3+b^2+b-a+1
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
(-3ab)(a^2b-3ab^2+1)
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如果a+b=3,ab=-1,那么(a+b)2-a-b+ab=?
当a-b等于-1,ab等于-2,（2a-3b-ab)-(a-2b+3ab)等于多少