Use Descartes's Rule of Signs to determine the possible numbers of positive and negative real zeros of
Question:
1. g(x) = 2x3 − 3x2 - 3
2. h(x) = 4x2 − 8x + 3
3. h(x) = 2x3 + 3x2 + 1
4. h(x) = 2x4 − 3x − 2
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