2006 |
20062-2007×2005 |
2006 |
20062-2007×2005 |
2006 |
20062-(2006+1)×(2006-1) |
2006 |
20062-20062+ 1 |
A.(-a-b)2+(a-b)2=-4ab | B.(-a-b)2+(a-b)2=a2+b2 |
C.(-a-b)(a-b)=(a-b)2 | D.(-a-b)(a-b)=-a2+b2 |
A.8(a-b) | B.8(a+b) | C.8b2-8a2 | D.8a2-8b2 |
1 |
2 |
A.(x-2y)(2y+x) | B.(x-2y)(-2y+x) | C.(x+y)(y-x) | D.(2x-3y)(3y+2x) |
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