Question 1136756
4x^4-5x^3-1x^2=0 
factor an x^2 out
x^2(4x^2-5x-1)=0
x^2=0, x=0
x=(1/8)(5+/- sqrt (25+16))
x=(1/8)(5+/-sqrt(41))
numerical solution is +1.425 and -0.175 The third solution is 0.

{{{graph(300,300,-2,2,-10,10,4x^4-5x^3-x^2)}}}