/a+1/+(b-2)^2=0
∴a+1=0
b-2=0
∴a=-1 b=2
5ab^2-2a^2b-3[ab^2-2(2ab^2+a^2b)]
=5ab²-2a²b-3ab²+12ab²+6a²b
=14ab²+4a²b
=-14*4+4*2
=-48
/a+1/+(b-2)^2=0
∴a+1=0
b-2=0
∴a=-1 b=2
5ab^2-2a^2b-3[ab^2-2(2ab^2+a^2b)]
=5ab²-2a²b-3ab²+12ab²+6a²b
=14ab²+4a²b
=-14*4+4*2
=-48