a |
bc |
c |
ab |
b |
ac |
1 |
a |
1 |
b |
1 |
c |
a |
bc |
c |
ab |
b |
ac |
1 |
a |
1 |
b |
1 |
c |
a2+ b2+c2-bc-ac-ab |
abc |
2a2+2b2+2c2-2bc-2ac-2ab |
2abc |
(a-b)2+(a-c)2+(b-c)2 |
2abc |
1+4+1 |
2×24 |
1 |
8 |
a2+4a+4 |
a+1 |
3 |
a+1 |
a-b |
a |
a2-2ab+b2 |
a |
2 |
a |
3 |
a |
b |
a |
c |
b |
3b |
2a |
1 |
x |
1 |
y |
2a |
a-b |
a+b |
b-a |
x2-1 |
(x+1)2 |
() |
x+1 |
a2 |
a+3 |
9 |
a+3 |
a |
a-b |
b |
b-a |
1 |
a+1 |
1 |
a-1 |
2a |
a2-2a+1 |
x2+4 |
x |
x2-4 |
x2+2x |
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