Multiply.(u2 - 3)(u2 + u - 4)
A. u4 + u3 - 7u2 - 3u + 12
B. u4 - 3u2 - 3u + 12
C. u4 + u3 - 3u + 12
D. u4 + u3 + 7u2 - 3u + 12
Answer: A
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A. 
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B. 
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C. 
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D. 
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