(a+1)^2+ |b-1/2 |=0
∴a+1=0
b-1/2=0
∴a=-1
b=1/2
6a²-【a²b-3(ab²-2a²b)】-2ab²
=6a²-a²b+3ab²-6a²b-2ab²
=6a²-7a²b+ab²
当a=-1,b=1/2时
原式=6-7/2-1/4
=9/4
解:由题意得:
a+1=0
b-1/2=0
a=-1
b=1/2
把a=-1 b=1/2代人6a^2-[a^2b-3(ab^2-2a^2b)]-2ab^2得:
=6-[1/2-3(-1/4-1)]+1/2
=6-1/2-15/4+1/2
=9/4
所以所求代数式的值是9/4
墨迹