a |
a-1 |
a-1 |
a-2 |
a |
a-1 |
a-1 |
a-2 |
a(a-2) |
(a-1)(a-2) |
(a-1)2 |
(a-1)(a-2) |
a(a-2)-(a-1)2 |
(a-1)(a-2) |
a2-2a-a2+2a-1 |
(a-1)(a-2) |
1 |
(a-1)(a-2) |
a |
a-1 |
a-1 |
a-2 |
1 |
(a-1)(a-2) |
1 |
(a-1)(a-2) |
a |
a-1 |
a-1 |
a-2 |
4 |
x2-4 |
1 |
x+2 |
1 |
2-x |
A.A=B | B.A×B=1 | C.A+B=0 | D.A-B=2 |
1 |
1+x |
1 |
1-x |
2x+1 |
x-1 |
m |
x-1 |
2x+1 |
x-1 |
2x+1 |
x-1 |
m |
x |
x |
x-y |
y2 |
x(x-y) |
A.x2-y2 | B.
| C.
| D.
|
2a |
a2-9 |
1 |
a-3 |
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