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单选题
If a-b = -4, what is the value of a2 -2ab + b2?
A
-32
B
-16
C
0
D
16
E
32
参考答案
参考解析
解析：
分解多项式a2- 2ab + b2 = (a-b) 2=16。
分解多项式a2- 2ab + b2 = (a-b) 2=16。
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