Question 700532
{{{-8n^2+8n+6=8}}}

{{{-8n^2+8n+6-8=0}}}

{{{-8n^2+8n-2=0}}}


the discriminant is {{{b^2-4*a*c}}}


{{{8^2-4*(-8)*(-2)}}}

{{{64-4*(16)}}}

{{{64-64}}}

{{{0}}}.......if discriminant is {{{0}}} means we only have one real solution


{{{ graph( 600, 600, -10, 10, -10, 10,-8x^2+8x-2) }}}