Question 1062509
<pre>
{{{s}}}{{{""=""}}}{{{xA^2 + mA}}}

Subtract s from both sides

{{{0}}}{{{""=""}}}{{{xA^2 + mA-s}}}

{{{xA^2 + mA-s}}}{{{""=""}}}{{{0}}}

We use the quadratic formula, but so we won't
have conflicting letters, we write the quadratic
formula using different letters from normal:

The general quadratic equation is

{{{J*V^2+K*V+N}}}{{{""=""}}}{{{0}}} 

{{{V}}}{{{""=""}}}{{{(-K +- sqrt( K^2-4*J*N ))/(2*J) }}}

where J=x, V=A, K=m, N=-s

{{{A}}}{{{""=""}}}{{{(-m +- sqrt(m^2-4*x*(-s)))/(2*x) }}}

{{{A}}}{{{""=""}}}{{{(-m +- sqrt( m^2+4xs))/(2x) }}}

Edwin</pre>