find the number of positive and negative roots
{"Image DocumentName": "Find the number of Positive and Negative Roots", "Image ImageDescription": "P(x) = x5 \u2013 3x4 + x2 \u2013 x + 6. How many sign changes in coefficients? 4. So there are 4, 2, or 0 positive real roots. Now find P(-x) (for odd exponents, change the sign) P(-x)= -x5 \u2013 3x4 + x2 + x + 6. There is 1 sign change. There 1negative real root. (can\u2019t be less because it can\u2019t be reduced by a multiple of 2)", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}