5. what does descartes's rule of signs tell you about the real roots of the polynomial?

–2x3 + 3x2 – 5x – 2 = 0 (1 point)
there is one positive root and either 2 or 0 negative roots.
there are either 2 or 0 positive roots and there are either 2 or 0 negative roots.
there is one positive root and one negative root.
there are either 2 or 0 positive roots and one negative root.