Add and write the resulting polynomial in descending order of degree.(7x8 - 9x4 + 6x2 + 2) + (5x7 + 6x4 - 9x)
A. 12x8 - 15x4 + 6x2 - 9x + 2
B. 7x8 + 5x7 - 3x4 + 6x2 - 9x + 2
C. 7x8 + 5x7 + 3x4 + 6x2 - 9x + 2
D. 12x8 - 3x4 + 6x2 - 9x + 2
Answer: B
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A. - 
B. - 
C. 
D. 
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__________ in.2
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B. 
C. 
D. 