Question 890932
{{{x*(x+1)=650}}}
{{{x^2+x-650=0}}}
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-1 +- sqrt( 1^2-4*1*(-650) ))/(2*1) }}}
{{{x = (-1 +- sqrt( 2601))/2 }}}
{{{x = (-1 +- 51)/2 }}}
{{{x[1]=-26}}}, {{{x[2]=25}}}
{{{x[1]+1=-26+1=-25}}}, {{{x[2]+1=25+1=26}}}
Answer: {{{-26}}} and {{{-25}}}, or {{{25}}} and {{{26}}}