Question 455560
Assuming x different from zero, multiply both sides by x

{{{x*(d/x)=x(ax+b)}}} simplify {{{d=ax^2+bx}}}, set the equation to zero

{{{ax^2+bx-d=0}}}, and solve the equation using the quadratic formula:

{{{x=(-b+-sqrt(b^2+4ad))/2a}}}.