①
.
1 -3
-2 0.5 . =1×0.5-(-3)×(-2)=0.5-6=-5.5;
②∵
.
x x-3
3 -2 . =0,
∴-2x-3(x-3)=0,
∴-2x-3x+9=0,
∴-5x=-9,
解得:x=
9
5 .
故答案为:①-5.5.
①
.
1 -3
-2 0.5 . =1×0.5-(-3)×(-2)=0.5-6=-5.5;
②∵
.
x x-3
3 -2 . =0,
∴-2x-3(x-3)=0,
∴-2x-3x+9=0,
∴-5x=-9,
解得:x=
9
5 .
故答案为:①-5.5.