4xy |
16x2y |
a(a+b) |
b(a+b) |
x-y |
(y-x)2 |
ax+ay |
x2-y2 |
x2-16 |
x2+8x+16 |
x2-9 |
2x+6 |
1 |
4x |
a |
b |
x-y |
(x-y)2 |
1 |
x-y |
a(x+y) |
(x-y)(x+y) |
a |
x-y |
(x-4)(x+4) |
(x+4)2 |
x-4 |
x+4 |
(x-3)(x+3) |
2(x+3) |
x-3 |
2 |
1 |
4x |
a |
b |
1 |
x-y |
a |
x-y |
x-4 |
x+4 |
x-3 |
2 |
(a-b)(b-c)(c-a) |
(b-a)(a-c)2(c-b)3 |
0.2x+0.5y |
0.3x-2y |
-a |
a+b |
A.
| B.
| C.
| D.
|
A.
| ||||||||
B.
| ||||||||
C.-
| ||||||||
D.-
|
-x |
x-y |
A.
| B.
| C.
| D.-
|
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