Question 1036588
f(x)=4x^3-6x^2+8x-5
3 sign changes; 3 or 1 positive roots.ANSWER
f(-x)=-4x^3-6x^2-8x-5
No sign changes, no negative roots.
{{{graph(300,200,-10,10,-20,20,4x^3-6x^2+8x-5)}}}