4x2-y2 |
x2-4y2 |
(2x-y)2 |
x2-4y2 |
2y2-4xy |
4y2-x2 |
4x2-y2 |
x2-4y2 |
(2x-y)2 |
x2-4y2 |
2y2-4xy |
x2-4y2 |
4x2-y2-4x2+4xy-y2+2y2-4xy |
x2-4y2 |
0 |
x2-4y2 |
4 |
x2-1 |
x+1 |
x-1 |
2x2+1 |
x2-5x+6 |
x2-1 |
x2-5x+6 |
4-5x |
x2-5x+6 |
x+y |
x-y+z |
x+z |
y-x-z |
y+z |
z+x-y |
x-1 |
x+1 |
N |
x+1 |
A.-1 | B.1 | C.-2 | D.2 |
1 |
1×3 |
1 |
2 |
1 |
3 |
1 |
3×5 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
5×7 |
1 |
2 |
1 |
5 |
1 |
7 |
1 |
17×19 |
1 |
2 |
1 |
17 |
1 |
19 |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
17×19 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
2 |
1 |
5 |
1 |
7 |
1 |
2 |
1 |
17 |
1 |
19 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
17 |
1 |
19 |
1 |
2 |
1 |
19 |
9 |
19 |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
(x-1)x |
1 |
x(x+1) |
1 |
(x+1)(x+2) |
1 |
(x+2)(x+3) |
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