a |
b |
a |
c |
b+c |
b+c-a |
A.以a为腰的等腰三角形 | B.以a为底的等腰三角形 |
C.等边三角形 | D.以上答案都不对 |
a |
b |
a |
c |
b+c |
b+c-a |
a(b+c) |
bc |
b+c |
b+c-a |
a |
bc |
1 |
b+c-a |
2a |
2a2+a+2 |
1 |
3 |
2a2 |
2a4+a2+2 |
a |
b |
c |
d |
y |
x2-4xy+4y2 |
2 |
x-2y |
1 |
a2-a+1 |
1-a |
a3-1 |
a4-a2-2 |
(a6-1)-(a4+a2+1) |
x+y-xy |
x+y+2xy |
y+z-2yz |
y+z+3yz |
x+z-3zx |
x+z+4zx |
2 |
x |
3 |
y |
1 |
z |
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