A.
| B.
| ||||
C.
| D.
|
-a-b |
a+b |
a+b |
a+b |
-a-b |
a-b |
a+b |
a-b |
a2-b2 |
a-b |
(a+b)(a-b) |
a-b |
0.5x+0.7y |
2x-0.6y |
x |
2 |
y |
3 |
z |
4 |
2x+y-z |
3x-2y+z |
3(x+5) |
x(x+5) |
3 |
x |
x |
x2-2x |
A.
| B.
| ||||||||
C.
| D.
|
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 |
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