Question 972199
You don't have a right hand side.
I'll substitute Z for the right hand side and you can change the answer as needed.
{{{(a(x-b)^2+c)/d=Z}}}
{{{a(x-b)^2+c=Zd}}}
{{{a(x-b)^2=Zd-c}}}
{{{(x-b)^2=(Zd-c)/a}}}
{{{x-b=0 +- sqrt((Zd-c)/a)}}}
{{{x=b +- sqrt((Zd-c)/a))}}}