20002 |
1999×2001+1 |
20002 |
1999×2001+1 |
20002 |
(2000-1)×(2000+1)+1 |
20002 |
20002-1+1 |
A.a8-b8 | B.a6-b6 | C.b8-a8 | D.b6-a6 |
A.(2x+1)(2x-1) | B.(2x+1)(2x+1) | C.(-2x+1)(2x-1) | D.(2x-1)(2x-2) |
A.3 | B.4 | C.5 | D.6 |
A.(2y+6)(2y-6)=4y2-6 | B.(5y+
| ||||||
C.(2x+3)(2x-3)=2x2-9 | D.(-4x+3)(4x-3)=16x2-9 |
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