x-2y-3(-2x-3y-1)-2 |
2-1x2y-3 |
2 |
5 |
1 |
2 |
x-2y-3•(-2)-2x6y2 |
2-1x2y-3 |
x4y-1•(-2)-2 |
2-1x2y-3 |
1 |
2 |
1 |
4 |
2 |
5 |
1 |
2 |
1 |
3 |
41 |
60 |
A.(-3)-2=-9 | B.(-3)-1=-
| C.(ab)-2=ab-2 | D.(-
|
A.2x+x=3x2 | B.(-a2)•a3=a6 | C.-2x-2=-
| D.(2m)5=2m5 |
A.x>3 | B.x<3 | C.x≥3 | D.x≠3 |
1 |
3 |
A.-3 | B.
| C.-
| D.3 |
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