(1)∵|a|=|b|和已知数轴得:a=-b,即a+b=0,
∴|a|-|a+b|-|c-a|+|c-b|+|ac|-|-2b|
=a-0-(a-c)+(b-c)-ac-(-2b)
=a-a+c+b-c-ac+2b
=3b-ac;
(2)∵|a|=3,|b|=2且 |
a
b |=
a
b ,
∴a、b同号,
∴a=3,b=2或a=-3,b=-2,
∴当a=3,b=2时,
3a-2b=3×3-2×2=5,
当a=-3,b=-2时,
3a-2b=3×(-3)-2×(-2)=-5.
(1)∵|a|=|b|和已知数轴得:a=-b,即a+b=0,
∴|a|-|a+b|-|c-a|+|c-b|+|ac|-|-2b|
=a-0-(a-c)+(b-c)-ac-(-2b)
=a-a+c+b-c-ac+2b
=3b-ac;
(2)∵|a|=3,|b|=2且 |
a
b |=
a
b ,
∴a、b同号,
∴a=3,b=2或a=-3,b=-2,
∴当a=3,b=2时,
3a-2b=3×3-2×2=5,
当a=-3,b=-2时,
3a-2b=3×(-3)-2×(-2)=-5.