14xy(x+y)3 |
4x2(x+y)2 |
14xy(x+y)3 |
4x2(x+y)2 |
14xy(x+y)2(x+y) |
4x?x?(x+y)2 |
7y(x+y) |
2x |
2x |
x+y |
A.扩大两倍 | B.不变 | C.缩小两倍 | D.不能确定 |
x+y |
2x |
A.扩大3倍 | B.不变 | C.缩小3倍 | D.缩小6倍 |
ab |
a+b |
A.是原来的2倍 | B.原来的4倍 | ||
C.是原来的
| D.不变 |
b2+c2 |
a2 |
2x |
x+5 |
( ) |
3x+15 |
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