Simplify.(4x2 + 5x + 20) + (-6x2 - 8x - 9)
A. -2x2 + 3x + 11
B. -2x2 - 3x + 11
C. -2x2 - 3x + 29
D. -2x2 + 11x + 29
Answer: B
Mathematics
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, 
, . . .
A. 
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C. 
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What will be an ideal response?
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A. i B. -1 C. -i D. 1
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A. 
B. 
C. 
D. 
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