1 |
a-2 |
1 |
a+2 |
2a |
a2-4a+4 |
a+2+a-2 |
(a+2)(a-2) |
2a |
(a-2)2 |
2a |
(a+2)(a-2) |
(a-2)2 |
2a |
a-2 |
a+2 |
1 |
R |
1 |
R1 |
1 |
R2 |
3x |
x+2 |
x |
x+2 |
x |
x2-4 |
2x2-4x |
x+2 |
x2+2x |
x2-4x+4 |
4x |
2-x |
2 |
x-2 |
1 |
x2-4 |
2 |
a+1 |
a-1 |
a2+1 |
a2-2a+1 |
1 |
a-1 |
A.1和2 | B.2和3 | C.a>1 | D.a>2 |
© 2017-2019 超级试练试题库,All Rights Reserved.