A.
| B.
| C.
| D.
|
3 |
2 |
9 |
4 |
9 |
4 |
A.x2+y2=(x+y)2 | B.(2x-3y)3=(3y-2x)3 |
C.(x+y)2=(-x-y)2 | D.(a+b)(a-b)=(-a-b)(a-b) |
A.(a+b)2=a2+b2 | B.2×10-4×1×103=2 |
C.a3+a2=2a5 | D.(-2a3)2=4a6 |
A.(a+b)2=a2+b2 | B.(a+2b)2=a2+2ab+b2 |
C.(a-2b)2=a2-2ab+4b2 | D.(2a-b)2=4a2-4ab+b2 |
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