3 |
4 |
1 |
3 |
A.
| B.-
| C.
| D.-
|
A.-a+b-c+x-y | B.-a-b+c+x-y | C.-a+b+c+x+y | D.a+b-c-x+y |
A.3a2-2a2=1 | B.3a2-2a2=a | C.3a2-2a=a2 | D.3a2-2a2=a2 |
A.m=-3,n=2 | B.m=-3,n=-2 | C.m=2,n=3 | D.m=3,n=2 |
A.3a-2a=1 | B.-m-m=-m2 |
C.-7x2y3+4y3x2=-3x2y3 | D.2x2+2x2=4x4 |
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