y+1 |
x+1 |
x+1 |
y+1 |
(y+1)2+(x+1)2 |
(x+1)(y+1) |
(x+y)2-2xy+2(x+y)+2 |
xy+(x+y)+1 |
(-4)2-2×(-12)+2×(-4)+2 |
-12-4+1 |
34 |
15 |
34 |
15 |
2 |
a |
a2-4a+4 |
a2-4 |
a2-1 |
a2+6a+9 |
a2-9 |
a-1 |
1 |
a+1 |
a2-a |
a+1 |
1 |
2 |
1 |
x-1 |
x |
x2-1 |
1 |
x |
1+x2 |
x |
a2 |
a-2 |
4 |
2-a |
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