a+1 |
a2-a |
a2-1 |
a2-2a+1 |
A.
| B.a | C.
| D.
|
a+1 |
a(a-1) |
(a-1)2 |
(a-1)(a+1) |
1 |
a |
1 |
36-a2 |
1 |
a2-6a |
x2-1 |
x2+4x+4 |
(x+2) |
x2+x |
x+2 |
x2-2x |
x-1 |
x2-4x+4 |
4-x |
x |
(x-1)(x+2) |
(x+1)(x+2) |
A.5x2-1 | B.5x2-5 | C.5x2+10x+5 | D.x2+2x+1 |
x3y |
z |
xz |
y |
yz |
x2 |
A.
| B.x3y3z | C.xy4z4 | D.y5z |
x2-y2 |
x2-6x+9 |
x+y |
2x-6 |
A.
| B.
| C.
| D.
|
© 2017-2019 超级试练试题库,All Rights Reserved.