12x3 + 5 + 5x2 - 6x2 - 3x3 - 9 - x
Which expresses the polynomial in standard form?
A: 9x3 + x2 - x - 2
B: 9x3 - x2 - x - 4
C: 9x3 - x2 - x - 45
D: 9x5 - x2 - x - 4
Combine like terms and place them in order of decreasing exponent
9x^3 - x^2 -x - 4
Answer is B
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