1 |
2 |
1 |
4 |
4 |
9 |
1 |
13 |
1 |
2 |
5 |
4 |
1 |
2 |
5 |
2 |
5 |
4 |
2 |
5 |
1 |
4 |
4 |
9 |
1 |
13 |
13 |
4 |
4 |
9 |
14 |
13 |
4 |
13 |
4 |
9 |
13 |
14 |
2 |
7 |
A.a9÷a3=a3 | B.a3•a2=a6 | C.-a5÷(-a)3=a2 | D.-a5-a2=a3 |
A.(-a+b)(-a-b)=b2-a2 | B.(2b)3=2b3 |
C.a3÷a3=0 | D.(a2)3=a6 |
A.a2÷a-1=a3 | B.a3+a3=2a6 | C.a3×a3=a9 | D.a4-a4=a0 |
A.3a-a=2 | B.2a+3b=5ab | C.(-6)÷(-2)=-3 | D.(-
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