20062 |
2005×2007+1 |
20062 |
2005×2007+1 |
20062 |
(2006-1)×(2006+1)+1 |
20062 |
20062-1+1 |
20062 |
20062 |
A.(a+3b)(a-3b)=a2-3b2 | B.(-a+3b)(a-3b)=-a2-9b2 |
C.(-a-3b)(a-3b)=-a2+9b2 | D.(-a-3b)(a+3b)=a2-9b2 |
A.232 | B.264 | C.232-1 | D.264-1 |
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