1 |
a+b |
a+b |
a2+2ab+b2 |
2x(x-y)7 |
4y(y-x)6 |
x(x-y) |
2y |
(a+b)2 |
a2-b2 |
a+b |
a-b |
3 |
a+b |
9a(a+b) |
3a(a+b)2 |
1 |
a+b |
a+b |
a2+2ab+b2 |
1•(a+b) |
(a+b)(a+b) |
a+b |
a2+2ab+b2 |
2x(x-y)7 |
4y(y-x)6 |
2x(x-y)7÷2(x-y)6 |
4y(y-x)6÷2(x-y)6 |
x(x-y) |
2y |
(a+b)2 |
a2-b2 |
(a+b)2÷(a+b) |
(a+b)(a-b)÷(a+b) |
a+b |
a-b |
3 |
a+b |
3×3a(a+b) |
(a+b)×3a(a+b) |
9a(a+b) |
3a(a+b)2 |
A.如果a>b,则ac2>bc2 | ||||
B.分式
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C.若ab=cd,则
| ||||
D.连续两个奇数的平方差都能被8整除 |
A.
| ||||
B.
| ||||
C.
| ||||
D.
|
9mn2 |
36n3 |
m |
() |
x2+2xy+y2 |
x2-y2 |
x+y |
() |
A.
| B.
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C.
| D.
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