Question 470225
*Quadratic equation {{{ax^2+bx+c=0}}} 
A) Use  the quadratic formula {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
**If you have equation {{{x^2+c=0}}, then {{{x^2=-c}}}=> {{{x=+-sqrt(-c)}}}
***If you have equation {{{x^2+bx=0}}}, then {{{x(x+b)=0}}}, so
{{{x=0}}} or {{{x+b=0}}}
{{{x1=0}}} or {{{x2=-b}}}