(2a-1)的平方+|2a+b|=0
2a-1=0,2a+b=0
a=1/2,b=-1
|c-1|=2
c=3或-1
c×﹙a³-b)
=3(1/8+1)
=27/8
或
=-1×(1/8+1)
=-9/8