2-x |
x+2 |
2x |
x2-4 |
2 |
2-x |
x+2 |
x+2 |
x+2 |
2x |
(x+2)(x-2) |
-2x |
x+2 |
(x+2)(x-2) |
2x |
2 |
2 |
1 |
x |
x3+mx2+x |
x4+2mx2+1 |
1 |
3 |
A.-2 | B.-1 | C.1 | D.2 |
b2 |
a |
a2 |
b |
a2-4 |
a-3 |
1 |
a-2 |
10 |
x+2 |
30 |
x+7 |
x2-2x |
x+1 |
1 |
x |
1 |
3 |
2 |
y3 |
3 |
y2 |
4 |
y |
(1+m)2 |
m |
1+2m2 |
m |
© 2017-2019 超级试练试题库,All Rights Reserved.