题目
题型:解答题难度:一般来源:枣庄
x2-1 |
x2-2x+1 |
x2-2x |
x-2 |
2 |
3 |
答案
(x-1)(x+1) |
(x-1)2 |
x(x-2) |
x-2 |
1 |
x |
=
x+1 |
x-1 |
=
2x |
x-1 |
当x=
2 |
3 |
2×
| ||
|
核心考点
举一反三
x2-2x+1 |
x2-1 |
x-1 |
x2+x |
1 |
a |
1 |
a |
A.a-1 | B.-a-1 | C.1-a | D.a+1 |
x2-1 |
x2-2x+1 |
x2-2x |
x-2 |
2 |
3 |
(x-1)(x+1) |
(x-1)2 |
x(x-2) |
x-2 |
1 |
x |
x+1 |
x-1 |
2x |
x-1 |
2 |
3 |
2×
| ||
|
x2-2x+1 |
x2-1 |
x-1 |
x2+x |
1 |
a |
1 |
a |
A.a-1 | B.-a-1 | C.1-a | D.a+1 |