Subtract.(-2x2 + 7x4 - 4 - 3x3) - (6 + 9x3 + 2x4 - 4x2)
A. 9x4 + 6x3 - 6x2 - 10
B. 5x4 + 6x3 - 6x2 + 2
C. 5x4 - 12x3 + 2x2 - 10
D. 9x4 + 6x3 - 6x2 + 2
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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Mathematics