A.(-4x)(2x2+3x-1)=-8x3-12x2-4x |
B.(x+y)(x2+y2)=x3+y3 |
C.(-4a-1)(4a-1)=1-16a2 |
D.(x-2y)2=x2+4y2-2xy |
A.a2(a3+2)=a6+2a2 |
B.2x(x2+y)=2x3+2xy |
C.a10+a9=a19 |
D.20132013-20122012=2013 |
A.8 | B.-8 | C.
| D.0 |
1 |
4 |
2 |
3 |
1 |
3 |
1 |
4 |
1 |
6 |
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