Q4 (9 points) Consider the polynomial P(x) - 2x4 - 5x3 - 7x2 + 9x + 9. a) Find all possible rational roots of P(a). (3 marks) b) Use Descartes' rule of signs to determine the possible numbers of positive and negative roots of P(a). (3 mark c) Find a bound on the possible roots of P(x). (2 marks) d) Use pat (b) and (c) to reduce the list of possible rational roots of P(a ) found in part (a). (1 mark) + Drag and drop an image or PDF file or click to browse