Question 324080
{{{2 = 0.7n + 0.6n^2}}}
{{{20 = 7n + 6n^2}}}
{{{6n^2+7n-20=0}}}
{{{n = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{n = (-7 +- sqrt( 7^2-4*6*(-20) ))/(2*6) }}} 
{{{n = (-7 +- sqrt( 49+480 ))/(12) }}}
{{{n = (-7 +- sqrt( 529 ))/(12) }}}
{{{n = (-7 +- 23 )/(12) }}}
{{{n1 = (-7 +23)/12}}}
{{{n1=16/12}}}
{{{highlight(n1=4/3)}}}
.
.
.
{{{n2 = (-7 -23)/12}}}
{{{n2 = -30/12}}}
{{{highlight(n2= -5/2)}}}
.
.
.
{{{graph(300,300,-3,3,-3,3,6x^2+7x-20)}}}