Multiply.(2x + 2.1)(2x - 2.1)
A. 4x2 - 4.2
B. 4x2 - 4.41
C. 4x2 - 8.4x- 4.41
D. 4x2 - 44.1
Answer: B
Mathematics
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A. 
B. 0
C. all real numbers
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