Question 1010524
 h(x)=4x^4-5x^3+2x^2-x+5
There are 4 sign changes, so 4,2,0 positive roots.
h(-x)=+/++/+/+  There are no negative roots.
{{{graph(300,200,-10,10,-10,100,4x^4-5x^3+2x^2-x+5)}}}