Add.(3x3 + 5.6x + 4) + (9x2 - 2.3x - 8)

A. 12x3 + 13x2 - 7.9x - 8
B. 3x3 + 9x2 + 3.3x - 4
C. 3x3 + 13x2 - 3.3x - 8
D. 12x3 + 7.9x - 4


Answer: B

Mathematics

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Mathematics