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单选题
Which of the following is equivalent to 4n2 + 4n + 2?
A
4(n2 +n +1/2)
B
2(2n + 1)2
C
2(2n3+ 1)
D
(2n + 1)(2n+2)
E
(2n- 1)(2n- 2)
参考答案
参考解析
解析：
可以通过分配每个选项中的乘法公式解答这个问题。A. 4(n2 + n + 1/2) = 4n2 + 4n + 2；B. 2(2n+1)2= 2(4n2+4n+1)=8n2+8n+2；C. 2(2n3 + 1) =4n3 +2；D. (2n + 1)(2n + 2) = 4n2 + 6n + 2；E. (2n - 1)(2n - 2) = 4n2 - 6n + 2。
可以通过分配每个选项中的乘法公式解答这个问题。A. 4(n2 + n + 1/2) = 4n2 + 4n + 2；B. 2(2n+1)2= 2(4n2+4n+1)=8n2+8n+2；C. 2(2n3 + 1) =4n3 +2；D. (2n + 1)(2n + 2) = 4n2 + 6n + 2；E. (2n - 1)(2n - 2) = 4n2 - 6n + 2。
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