A.-32=9 | B.-20=0 |
C.5-3=-15 | D.3ab-8ba=-5ab |
1 |
53 |
1 |
125 |
1 |
4 |
A.1个 | B.2个 | C.3个 | D.4个 |
A.2a+2a=2a2 | B.(-a+b)(-a-b)=a2-b2 |
C.(2a2)3=8a5 | D.a2•a3=a6 |
A.(a+b)2=a2+b2 | B.x3+x3=x6 |
C.(a3)2=a5 | D.(2x2)(-3x3)=-6x5 |
1 |
x-y |
1 |
x+y |
2x-y |
x2-y2 |
A.a5•a5=2a10 | B.b4•b4=b8 | C.c4+c4=c8 | D.d3•d•d2=d5 |
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