Posted by **:D** on Thursday, April 25, 2013 at 3:58pm.

Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.

1. 9x^6-5x^4-2x^3+8x^2-4x=0

2. -9x^4+5x^3-2x^2+4x-3=0