1 |
3 |
A.2 | B.3 | C.0 | D.1 |
A.m=2,n=2 | B.m=-1,n=2 | C.m=-2,n=2 | D.m=2,n=-1 |
A.x2-(x-y+2z)=x2-x+y+2z | B.x-(-2x+3y-1)=x+2x-3y+1 |
C.3x-[5x-(x-1)]=3x-5x-x+1 | D.(x-1)-(x2-2)=x-1-x2-2 |
A.-8 | B.9 | C.8 | D.-9 |
1 |
3 |
A.2,-1 | B.-2,1 | C.-1,2 | D.-2,-1 |
1 |
2 |
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