y'(x)-\sqrt{\left(\text{a0}+\text{a1} x+\text{a2} x^2+\text{a3} x^3+\text{a4} x^4\right) \left(\text{b0}+\text{b1} y(x)+\text{b2} y(x)^2+\text{b3} y(x)^3+\text{b4} y(x)^4\right)}=0