Determine the possible number of positive real zeros and negative real zeros of the polynomial function using Descartes' rule of signs.f(x) = -4x7 - 9x6 - 4.5x5 + 3x4 + x + 18
A. 1 positive zero, 4 or 2 negative zeros
B. 1 positive zero, 3 or 1 negative zeros
C. 1 positive zero, 4, 3 or 1 negative zeros
D. 1 positive zero, 2 or 0 negative zeros
Answer: C
Mathematics
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