easy:
解:∵(a-1)²≥0 ,|b+1|≥0
又其和为0
∴a-1=b+1=0
∴a=1,b=-1
∴原式=5(3a²b-ab²)-a(-ab²+3a²b)
=15a²b-5ab²+a²b-3a³b
=ab(15a-5b+2-3a²)
=-(15+1+3-3)
=-16
(a-1)的二次方+|b+1|=0
a-1=0 b+1=0
a=1 b=-1
5(3a的二次方b-ab的二次方)-a(-ab的二次方+3a的二次方b)
=15a²b-5ab²+a²b²-3a³b
=ab(15a-5b+ab-3a²)
=-(15+5-1-3)
=-16