1. find the oblique asymptote of (8x^2 + 26x -7)/(4x-1)
2. use Descartes' rule of signs to determine how many positive and how many negative zeros the polynomial may have: f(x)= -x^4+x^2-1
3. list all potential rational zeros of the polynomial function. do not solve for them: f(x)=x^5-x^4+2x^2+3
4. solve the equation 2x^3 -3x^2 -2x+3=0 in the real number systerm