| ||||
|
0.5x-1 |
0.3x+2 |
(
| ||||
(
|
10x-15y |
6x+10y |
(0.5x-1)×10 |
(0.3x+2)×10 |
5x-10 |
3x+20 |
9a2(x+y) |
3a(x+y) |
9-x2 |
x2+5x+6 |
an+2-a2bn |
a2n+1-ab2n |
-(x+y)(x-y)2 |
(y+x)(y2-x2) |
a2+b2-c2+2ab |
a2-b2-c2-2bc |
x+y |
x-2y |
A.扩大3倍 | B.不变 | C.缩小3倍 | D.扩大6倍 |
y |
x |
() |
x2 |
a+b |
ab |
() |
a2b |
x2+xy |
x2 |
x+y |
() |
2x |
x+y |
A.不变 | B.扩大到原来的2倍 |
C.扩大到原来的4倍 | D.缩小到原来的2倍 |
2y |
x |
() |
x3 |
ab |
a2 |
b |
() |
1 |
mn |
() |
4m3n |
a2 |
a2+ab |
a |
() |
© 2017-2019 超级试练试题库,All Rights Reserved.