(a+2)²+|a+b+5|=0则：a+2=0,a+b+5=0得：a=-2,b=-33a²b-[2a²b-(2ab-a²b)-4a²]-ab=3a²b-2a²b+2ab-a²b+4a²-ab=4a²+ab 把a=-2,b=-3代入=16+6=22