According to descartes' rule of signs, how many possible real roots could the following polynomial function have? f(x)=3x^4-5x^3+5x^2+5x-2

What is this equation in point-slope form?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?